WFH won't go away, because children are being raised with FaceTime and Zoom as normalcy for them. Especially college students, most of their classes are "distance learning"; in fact, I found it difficult to register for in-person classes because most of them were going online only. This was in the before-times, but as late as 2018.
I had a professor say "don't try to do your laundry while you are working on a class assignment" and I chuckled, because I had done exactly that. It wasn't optimal for my attention, but my AFK times were less than 5 minutes.
My schedule is really flexible. They do measure my productivity in terms of the end results, and they look for me on Slack. But I can clock in/out whenever, throughout the week. And I do have problems with my sleep schedule. So if I feel drowsy then I will take a nap in the middle of the day, and if I wake up at 2am, then I clock in for 4 hours and I'm productive.
My employer receives my best efforts, and we trust each other, so I don't goof around while I'm on the clock, and I stay mindful of that time, because it belongs completely to them.