I have used those terminals and it’s easily possible to update the certs if you know what you’re doing. But an IT professional with experience in those terminals must do this and I guess there’s just too few of those around to fix all at once.

Sadly (or thankfully?) remote access to those terminals is pretty limited, so you most likely have to be there physically and can’t do remote config changes if you didn’t set that up in a very specific way before.