When the user is Idle for 20mins the screen should display the pop up screen like " Session has Timed out - Please enter login details again " like this. It is working for Onprem application ,but we migrated to GCP here it is not working .
1.At Advanced Tab of Access group we have added the time out details
I see that you also commented on a non-GCP question pxSessionTimer not working in Pega 8.7.5. Please see the suggestions provided by our other forum users there.