can you bring your own device in? This sounds like the sort of company you have your personal laptop beside your work one and go to that machine to do things like check your email, buy lunch, listen to music.
All while trying to get them to improve their policy, of course.
I've not had the need to do so, there's no issues using work machines for any of the above. The sec team just has some weird ideas on restricting work machines networking.
but yes if we want too there's no rules against using our own machines.
We can login to things like the company github etc using sso/ssh from our own machines, just not the Intranet services.