Can I See Where On-Premises Security Groups Are Used in SharePoint?

For anyone else who comes here, I started using this script:

https://knowledge-junction.com/2021/10/04/microsoft-365-powershell-script-get-all-sharepoint-sites-where-respective-security-group-has-permissions-using-sharepoint-online-powershell-connecting-tenant-using-username-and-password/

And changed it into this:

#Number of results
$numResults = 0

#Intro
Write-Host ""
Write-Host "##########################################" -ForegroundColor "Green"  
Write-Host -NoNewLine "#" -ForegroundColor "Green"  
Write-Host "                                        #" -ForegroundColor "Green"  
Write-Host "#  Find Sites That Contain Target Group  #" -ForegroundColor "Green"  
Write-Host -NoNewLine "#" -ForegroundColor "Green"  
Write-Host "                                        #" -ForegroundColor "Green"  
Write-Host "##########################################" -ForegroundColor "Green"  
Start-Sleep -s 3

#Check to see if the SharePoint Online Module is installed
Write-Host ""
Write-Host "Checking for installation of SharePoint Online module..." -ForegroundColor "Yellow"  
Start-Sleep -s 3

if (Get-Module -ListAvailable -Name Microsoft.Online.SharePoint.PowerShell) {
    Write-Host ""
    Write-Host "SharePoint Online module already installed." -ForegroundColor "Yellow"  
    Start-Sleep -s 3
} 
else 
{
    Write-Host ""
    Write-Host "Installing SharePoint Online module..." -ForegroundColor "Yellow"  
    Start-Sleep -s 3
    Write-Host ""
    Install-Module Microsoft.Online.SharePoint.PowerShell 
}

#Define Security Group
Write-Host ""
Write-Host "Type the name of the target Group: " -ForegroundColor "Yellow" -NoNewLine
$groupName = Read-Host 
Start-Sleep -s 3

#Connect to our M365 tenant - Please change here the tenant SharePoint site admin URL
Write-Host ""
Write-Host "Connecting to SharePoint Online..." -ForegroundColor "Yellow"  
Start-Sleep -s 3
Connect-SPOService "https://site-admin.sharepoint.com/"

#Get all SharePoint sites
Write-Host ""
Write-Host "Collecting Sites..." -ForegroundColor "Yellow"
Start-Sleep -s 3
$spoSites = Get-SPOSite -Limit All

#Seaching Every Site for target Group
Write-Host ""
Write-Host "Searching Sites..." -ForegroundColor "Yellow"
Write-Host ""
Start-Sleep -s 3
foreach ($spoSite in $spoSites)
{

    Write-Host $spoSite.Url -NoNewline

    #Search Groups
    try
    {
        $groups = Get-SPOUser -Site $spoSite.Url -Limit All |
        Where { $_.IsGroup -and $_.DisplayName -ne "Everyone" -and $_.DisplayName -ne "Everyone except external users"} 

        # verifying each group    
        foreach ($group in $groups)
        {
            #Check for Group match
            if($group.DisplayName.Contains($groupName))
            {
                #Site with Group
                Write-Host " *** Group Found ***" -ForegroundColor "Cyan" -NoNewline  
                
                #Add to count
                $numResults = $numResults + 1
            }           
        }        
    }
    catch
    {
        continue;
    }
    Write-Host "`r"
}

#Disconnect from SharePoint Online
Write-Host ""
Write-Host "Disconnecting from SharePoint Online" -ForegroundColor "Yellow"
Disconnect-SPOService

Write-Host ""
Write-Host "Found " -ForegroundColor "Yellow" -NoNewline 
Write-Host $numResults -ForegroundColor "Yellow" -NoNewline 
Write-Host " Site(s) containing " -ForegroundColor "Yellow" -NoNewline 
Write-Host $groupName -ForegroundColor "Yellow"
Write-Host ""
Write-Host "Mission Complete" -ForegroundColor "Green"
Write-Host ""