how I can make an service principal as an App Registration Owner with azure portal or PowerShell?

so the background as follows:

for installation and deployment process we need to modify a customer created App Registration. but we get not the right Application.ReadWriteAll but we could get Application.ReadWrite.OwnedBy.

I know that if creating an Graph Api Call (excecuted with Postman) as shown below it worked, because Creator is automatically the Owner. .

 HTTP-Post Request:
https://graph.microsoft.com/v1.0/applications   
with body:
     {
      "displayName": "AppRegName"
    }

But I need to solution with standard tool like azure portal or powershell and I found no way to assign or remove a service principal as owner to an App Registration.

Is there a way to to do this with powershell?

The authentifiaction with an service principal i dont't know how I can do it?

I think after I can create an App Registration with
$appRegistration = New-AzADApplication -DisplayName "AppRegCreatebyPS" but I very unexperinced in using powershell. So how I can tell powershell to use the service principal authentitification for creating App Registrations?

A short extra question:

Can I remove later the owner role for the service principal and how can I do it?

Thanks for all Readers And I hope someone can give me a hint.

You can create App registration, Service Principal for App registration, Add application owner and remove application owner all from PowerShell AzureAD module.

Command to install Azure AD module in PowerShell:

Install-Module AzureAD

You can use the below commands :

#Connect to Azure AD 
Connect-AzureAD

#Create Azure AD app Registration
$appRegistration = New-AzureADApplication -DisplayName "AppRegCreatebyPS"

# Create A service Principal for the above app Registration
New-AzureADServicePrincipal -AccountEnabled $true -AppId $appRegistration.AppId -AppRoleAssignmentRequired $true -DisplayName $appRegistration.DisplayName

# get objectid for the service principal
$serviceprincipal= Get-AzureADServicePrincipal -Filter "DisplayName eq 'AppRegCreatebyPS'"

#Get the old app registration for whom you want set owner
$oldappregistration = Get-AzureADApplication -Filter "DisplayName eq 'Postman'"

#add service principal to the application owner of old app registration
Add-AzureADApplicationOwner -ObjectId $oldappregistration.ObjectId -RefObjectId $serviceprincipal.ObjectId

# verify the owner for the old app registration
Get-AzureADApplicationOwner -ObjectId $oldappregistration.ObjectId

#remove the owner for the old app registration
Remove-AzureADApplicationOwner -ObjectId $oldappregistration.ObjectId -OwnerId $serviceprincipal.ObjectId

Reference:

Cmdlts for Azure AD module reference