How to align correctly mat form field in my forms in Angular 11 material?

I am following the example from https://material.angular.io/components/stepper/examples but all my matform field is the same line this the picture

<mat-horizontal-stepper linear #stepper>
    <mat-step [stepControl]="identiteFormGroup" [editable]="isEditable">
    <form [formGroup]="identiteFormGroup">
      <ng-template matStepLabel>Identite</ng-template>
      
     <mat-grid-list cols="1" rowHeight="100px">
    <mat-grid-tile>
        <div class="controles-container">
        <mat-form-field>
                <mat-label>Nom</mat-label>
                <input matInput formControlName="firstCtrl" placeholder="Nom voyageur" required>
                <mat-error>Le nom est obligatoire.</mat-error>
        </mat-form-field>
        <mat-form-field>
            <input matInput formControlName="numIdentite"  placeholder="Numero identite*" >
            <mat-error>Le numero d'identité est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="numIdentite"  placeholder="Numero identite*" >
            <mat-error>Le numero d'identité est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="nom"  placeholder="Nom*" >
            <mat-error>Le nom est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="prenom"  placeholder="Prenom*" >
            <mat-error>Le prenom est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="postnom"  placeholder="Postnom*" >
            <mat-error>Le postnom est obligatoire.</mat-error>
          </mat-form-field> 
        </div>
    </mat-grid-tile>
    </mat-grid-list>
      <div>
        <button mat-button matStepperNext>Next</button>
      </div>
    </form>
      </mat-step>
      <mat-step [stepControl]="voyageFormGroup" [editable]="isEditable">
    <form [formGroup]="voyageFormGroup">
      <ng-template matStepLabel>Adresse</ng-template>
  <mat-grid-list cols="1" rowHeight="100px">
    <mat-grid-tile>
        <div class="controles-container">
        <mat-form-field>
                <mat-label>Titre</mat-label>
                <input matInput formControlName="titre" placeholder="titre*" required>
                <mat-error>Le titre est obligatoire.</mat-error>
        </mat-form-field>
        <mat-form-field>
            <input matInput formControlName="aute"  placeholder="auteur*" >
            <mat-error>auteur est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="numb"  placeholder="nombre*" >
            <mat-error>nombre est obligatoire.</mat-error>
          </mat-form-field>
          <mat-form-field>
            <input matInput formControlName="prc"  placeholder="Parc*" >
            <mat-error>parc est obligatoire.</mat-error>
          </mat-form-field>
        </div>
    </mat-grid-tile>
    </mat-grid-list>
      <div>
        <button mat-button matStepperPrevious>Back</button>
        <button mat-button matStepperNext>Next</button>
      </div>
    </form>
  </mat-step>
  <mat-step [stepControl]="detailFormGroup" [editable]="isEditable">
    <form [formGroup]="lieuFormGroup">
      <ng-template matStepLabel>Lieu</ng-template>
      <mat-grid-list cols="1" rowHeight="100px">
        <mat-grid-tile>
            <div class="controles-container">
            <mat-form-field>
                    <mat-label>Lieu</mat-label>
                    <input matInput formControlName="lieu" placeholder="lieu*" required>
                    <mat-error>Lieu est obligatoire.</mat-error>
            </mat-form-field>
            <mat-form-field>
                <input matInput formControlName="aute"  placeholder="auteur*" >
                <mat-error>auteur est obligatoire.</mat-error>
              </mat-form-field>
              <mat-form-field>
                <input matInput formControlName="numb"  placeholder="nombre*" >
                <mat-error>nombre est obligatoire.</mat-error>
              </mat-form-field>
              <mat-form-field>
                <input matInput formControlName="prc"  placeholder="Parc*" >
                <mat-error>parc est obligatoire.</mat-error>
              </mat-form-field>
            </div>
        </mat-grid-tile>
        </mat-grid-list>
      <div>
        <button mat-button matStepperPrevious>Back</button>
        <button mat-button matStepperNext>Next</button>
      </div>
    </form>
  </mat-step>
  <mat-step>
    <ng-template matStepLabel>Done</ng-template>
    <p>You are now done.</p>
    <div>
      <button mat-button matStepperPrevious>Back</button>
      <button mat-button (click)="stepper.reset()">Reset</button>
    </div>
  </mat-step>
</mat-horizontal-stepper>

the bad result The desired result is this:

1. Nom input first line(first mat-form-field)
2. Numero input second line (secind mat-form-field)
3. ... the same behaviour for the other

desired result

How can i do this please help ?

First, add this CSS snippet at your styles.css/styles.scss file.

.mat-grid-tile .mat-figure {
  justify-content: left !important;
}

Since you are using mat-grid-list you have to manually align the content to left.

Second, If you want every mat-form-field on a separate line. Then you have to add every mat-form-field separately inside separate mat-grid-tile. E.g:

<mat-grid-tile>
    <mat-form-field>
        <mat-label>Nom</mat-label>
        <input matInput formControlName="firstCtrl" placeholder="Nom voyageur" required>
        <mat-error>Le nom est obligatoire.</mat-error>
    </mat-form-field>
</mat-grid-tile>

Working demo at StackBlitz.

Final result: