Azure AD Graph API or Powershell Graph: Gathering all the assigned roles that are associated to a group

I am currently trying to get all the roles that can be associated to a given group in Azure AD. I have been successful so far using the Get-MgRoleManagementDirectoryRoleAssignment command. But the problem is that this command is only offering me the roles in the Active Assignments tab. Is there a way for me to be able to gather the values for the Eligible Assignments tab?

I have created an array populated by the groups I have, given them their names and the objectId, and then I am just running this foreach loop:

foreach($group in $groups){
  $objectId= $group.ObjectId
  $RoleAssignments = Get-MgRoleManagementDirectoryRoleAssignment -Filter "PrincipalId eq '$objectId'" 
  $allRoleAssignments= Get-MgRoleManagementDirectoryRoleAssignment 


foreach($assignment in $RoleAssignments){
    $roleDefinition = Get-MgRoleManagementDirectoryRoleDefinition -UnifiedRoleDefinitionId $assignment.RoleDefinitionId
    Write-Output "Group Name: $($group.Name), Assigned Role Name: $($roleDefinition.DisplayName)"
  }
}

All of this is working fine, but it only gives me the values in the active roles section. I have also tried checking using the Graph API, also nothing relevant showed up so far. Thank you!

Initially, I created Security Group Group02 , and assigned Application Administrator as Eligible Assignment role.

Note: For eligible assignment, roleEligibilityScheduleInstances is used.

Use below graph query :

GET https://graph.microsoft.com/v1.0/roleManagement/directory/roleEligibilityScheduleInstances?$filter=principalId eq '<GroupObjectId>'&$expand=roleDefinition

Use below Powershell Command :

Import-Module Microsoft.Graph.Identity.Governance

Get-MgRoleManagementDirectoryRoleEligibilityScheduleInstance -Filter  "principalId eq '<group object id>'" -ExpandProperty "roleDefinition"

Reference:

List roleEligibilityScheduleInstances.