Is it possible that these two circumstances are overlapping in your case?
Do you miss the commute and sitting in an office (on-location work) or do you miss speaking with people (socialization)?
I mis-conversations being unscheduled
And I miss socialize "with coworkers". We're working on the same project. That socializing helps know what's going one, what each other is doing, what problems we are running into. It gives up empathy for each other tasks etc. Reading about it in various forms of online databases doesn't come close.
I miss having lunch with coworkers the most. There's some natural bonding and trust building that happened over lunch, talking about random things, both work and not work related. This is very hard and possibly impossible to replicate with remote work.
With remote work, meetings are scheduled for a reason. Meeting just to "hang out" feels weird. Multi-user meetings with more than a few people also feel off because everyone is interrupting each other, you can't have multiple threads of conversation. Talking on slack, you usually can't tell how the person is feeling. The tone is lost. I've found communication is generally much poorer.
No thanks for offices.
There is a need to defend it though. I've already seen several businesses claim that remote work is "the future". Personally, I feel that remote work has been very detrimental to my mental health and I hate it. I don't want that future. It feels very unhealthy.