The idea of booking dentist / doctor / boiler repair / whatever in work time just to stick it to the man just shows why businesses are keen to get people back in.
the last two places i worked have been hybrid and you chose how often you went in (or me 2-3 days per week depending on my schedule). Which was great for me because my commute is always long because i live in the sticks (my choice, and i accept a commute but when it's not necessary, i choose not to. eg when there is a train strike)
Both companies emphasise on their websites, in any literature and in interviews that they are hybrid in order to improve work/life balance. They both (different industries) gave examples of things like dental appointments, which are hard to get and even harder if you are restricted to certain times or having to take a day off. they also gave examples of if you felt bad in the morning but better in the afternoon you could easily get in at least half a day, rather than taking a whole sick day or commuting for 2 hours for 4 hours work. etc etc.
One company was huge, one small. But they trusted their employees. Anyone they thought wasn't pulling their weight were spoken to, and i know of at least one who had to work 5 days office for 6 months (then he quit so, meh).
Some jobs/employees are more suited to hybrid than others.
But also: i would not be setting up my office. As an employee i expect to be able to arrive, plug in my laptop and start working. Not start cleaning, or perch at an unsuitable shelf surrounded by dusty boxes.
ETA: in principle i am not averse to a bit of mucking in. But this isn't mucking in is it? Amazon demanded everyone in California went back to 5 days office and found they had 800 too many staff compared to workstations. That is just daft and obvs on a far greater scale than at OPs place but it is the same in principle.
In OPs shoes i would point out the DSE compliance stuff, and not do any work until i had organised the room to fit those criteria. I don't dust (anywhere, ever) because i have severe allergies, so someone else would be doing that, but i would be calling IT and the facilities manager etc, to have it all arranged. But i wouldn't be working at a workstation that wasn't compliant with regulations.