I cannot speak for OP but as a working manager, COVID was hard to really keep forward progress.
I had people that were rockstars in the office that just didnt do work at home.
Maybe its the removal of distractions (no TV, I may walk by, etc). But even for things that were totally fine remote (ie: Ticket Queues) i noticed very quickly if my status showed "in" they were on it. If my status for any reason showed away, tickets would straight up get ignored. Mentioning this would enact change for a day or two, but ultimately it would return back to status quo. What did happen is that those that were self motivated were quicker/starting to burn out. I had to get with them and intervene and encourage them to take time off, encourage them to let the queue go for their teammates to pick it up etc.
I had other colleagues asking my ops teams to check in on their direct reports and I often had to have meetings telling them thats not a IT/Tech issue and they need to deal with it, just like I am having to..
Frankly i had a mouse shaker on a side box not for MY Managers, but for my direct reports...
As we transitioned back to the office a lot of these issues mostly disappeared. EXCEPT for those with weak/timid managers. A lot of those guys are still slacking, but they were slacking before and the manager just didnt want to handle it.
But my teams....most of them are mostly back to normal. We all have burnout to deal with, myself included and I have had to manage to balance pushing them and encouraging them to do things that dont cause burnout, front structuring your workday, to taking mental health days etc. But ultimately the return to the office was a relief for me, and a lot of that just went away.
I personally think its the removal of distractions coupled with the "threat" of someone walking up that doesnt exist at home. And its worth saying, I'm not one of those old school butts in chairs kinda guy. In fact im pretty laid back, and have been told so by peers and reports alike, and in many cases I have been asked how I am able to be so laid back and still have productivity like I do, but covid made it harder.
And thats beyond the fact that I have colleagues in other divisions that i KNOW are using their WFH days to be out fishing, playing golf, hiking whatever. Personally for me thats an ethics issue, i take days off for that. But I work in a small sector, im not going to tattle tail on someone i may cross paths with down the line, karma will catch them anyhow.