Remove O365 Groups owners from Site Collection admin for Teams connected SharePoint site

Gurdev Singh 
i have created/tested below mentioned script and it removes the M365 group owners from site collection admin

########### Script starts here ##############################

# Parameters
# Connect to the SharePoint Online site
$siteUrl = "https://TenantName.sharepoint.com/sites/SiteName

#This prefix is to detect the M365 group owners claim

$prefixToRemove = "c:0o.c|federateddirectoryclaimprovider"

# Connect to site
Connect-PnPOnline -Url $siteUrl -Interactive

# Get current site collection administrators
$siteAdmins = Get-PnPSiteCollectionAdmin

# Filter out administrators to be removed (Here we use the prefix to get M365 group owners group)
$adminsToRemove = $siteAdmins | Where-Object { $_.LoginName -like "$prefixToRemove*" }

# Remove filtered administrators
foreach ($admin in $adminsToRemove) {
Remove-PnPSiteCollectionAdmin -Owners $admin.LoginName
Write-Host "Removed administrator: $($admin.LoginName)"
}

#Verify the change
Connect-PnPOnline -Url $SiteURL -Interactive
$siteAdmins = Get-PnPSiteCollectionAdmin
Write-Host "Site Collection Administrators:"
$siteAdmins | ForEach-Object { Write-Host $_.LoginName }

############### Script ends here ##########################

I have tested and validated the same. This should do the job. I have also monitored the Sites for any unusual behavior however did not find any.

Note: Please test it on your test site to verify what it does and make sure everything related to that site works well before taking it to the production site.