I installed the login screen extension but also had to disable FileVault. It doesn't work all the time, but it's better now. I guess with FileVault on, the extension couldn't work properly. Unfortunately, the documentation on this tool is very thin...

Sorry to bring up an old thread but has there been a fix to this at all?

I have set up the eventscripts as per a previous poster - but it only runs sometimes and isn't reliable.

I have 2 users on my M2 MBA that we switch between whilst the laptop is in clambshell mode and we have to open display link manually when users are switched