Check that “Filter lists > Privacy > Block outsider intrusion into LAN” is enabled and you should be fine

You can already do that:

Get-AppxPackage "Microsoft.XboxApp" | Remove-AppxPackage
Get-AppxPackage "Microsoft.XboxIdentityProvider" | Remove-AppxPackage -ErrorAction SilentlyContinue
Get-AppxPackage "Microsoft.XboxSpeechToTextOverlay" | Remove-AppxPackage
Get-AppxPackage "Microsoft.XboxGameOverlay" | Remove-AppxPackage
Get-AppxPackage "Microsoft.XboxGamingOverlay" | Remove-AppxPackage
Get-AppxPackage "Microsoft.Xbox.TCUI" | Remove-AppxPackage
Set-ItemProperty -Path "HKCU:\Software\Microsoft\GameBar" -Name "AutoGameModeEnabled" -Type DWord -Value 0
Set-ItemProperty -Path "HKCU:\System\GameConfigStore" -Name "GameDVR_Enabled" -Type DWord -Value 0
If (!(Test-Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\GameDVR")) {
	New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\GameDVR" | Out-Null
}
Set-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\GameDVR" -Name "AllowGameDVR" -Type DWord -Value 0

You’re welcome