It depends. If the kind work is something that is more technologically based in some way, then yes, I'd wager that more and more companies will realize that letting people work from home is a sound idea that should stick around permanently. But even in some jobs that can be done remotely such as customer service representatives, secretaries/receptionists, etc etc, I think companies would want those people to come back, which sucks. The kind of thing I'm studying and working on right now is art centered but it's also very computer based, so lots of remote work is available for that kind of thing. I would guess that it would stick around after Covid is over, if it ever truly goes away lol. Taking online classes, when done right, was a pleasant experience for me, so working from home might be the same way. Not always an easy thing to do when other things are happening in the home such as noise, kids and pets running around, and so on.. but doable for certain workers.
I sometimes wonder if my C-PTSD and other psychiatric distress would keep me from working outside despite my going to psychiatrists, doctors, and taking medication long-term, so I do hope more flexible work options can remain. Not everyone is able bodied (or able minded), after all.