Bit of a late response, but my place has been a little similar in terms of, admittedly, not really wanting us back in the office but 'encouraging' us to go back in.
I've been working from home since the pandemic started and like you, the benefits of not having to get to the office (saving time and money) and having improved work life balance as a result is much better, as I can just log off and that's that.
However, what I have found at times is because your home is both your personal and office space, it can be difficult to switch off at times and get caught up with doing over your hours or even just check work emails when you've clocked off (case in point, my flexi hours got to about 60 hours they owed me last year). My own work nature of being a fucking idiot time and shift wise doesn't help mind. As an example, we had a major incident occur earlier this year where about 800-900 patient records got mixed due to an external error. The whole team had to urgently prioritise this correction and drop everything else, but we had overtime available to us for both evenings and weekends. I won't lie and say the extra money wasn't enticing, but because I had already planned to see my folks the weekend after it happened, I wanted to do my bit for the team as I felt I'd not be able to do much more afterwards. In the end, I did a 24 straight shift/overtime hybrid from 5pm until 5pm the following day. I don't recommend it in any way, shape or form.
The other part for me is that as I live on my own, staring at the same four walls and speaking to yourself isn't the most healthiest thing you can do mentally. In this case, I would have happily popped into the office more, but because no one in my team ever did, it'd be pointless to go all the way in to do exactly what I do at home. Since moving into my new role though, this has improved a little as the team meet up once a month at the office, which I'm happy to do.
In terms of my workplace, they've tried to push the office working without telling us that we must go back in, but they seem to have backed off from that now as it makes no real sense to get people back in, especially as they've actually reduced the number of available desks overall, so all teams couldn't go back in anyway.