When I started my phd (in a different country, during late covid times) my only collegue who would have sat in my room always worked from home. It wasn't very fun at all. Well, very few people came to the office anyways, so I just had to try and figure out everything by myself, eat lunch alone, etc. etc.

I am so much happier now in a 4 person room where I have 1-3 collegues to talk to depending on the day.