Android used to have an "office hours" setting which would prevent specific email accounts from notifying you outside of your specified times.
I had my work GMail set to notify only between 0800 (so I could check for a "don't come in" message) and 1700 Mon-Fri. Of course, it didn't account for holidays / sick leave etc, but it was good at prevent me from panic checking every ping.
I wish that was a feature on modern Gmail. Or, indeed, WhatsApp and Signal. You can manually mute, but there's no way to silence specific notifications at specific times.
Regardless, employees shouldn't be expecting employees to be on-call without compensation. But users also need ways to manage this themselves.
I use 2 different email apps for exactly this reason. I can check my work email if I need to, but I don’t want notifications.
Check out Buzzkill, its a great app for managing notification rules. You can set it to hide and batch up notifications during your off hours and show them later.
> Or, indeed, WhatsApp and Signal.
You can use Shelter from FDroid to create a separate work profile in the phone, with separate accounts, and then pause it after office hours.