I don’t think it’s up to you to sort OP, it’s up to him.
WFH is not convenient or practicable longer term. His employers need to offer an alternative. It’s not reasonable for them to monopolise yours and your daughter’s living space for their benefit. Unless they’re going to start paying half your mortgage and overheads they can fuck off. Is there a reason why you can’t speak to your DH and tell him it’s not working for you?
If my DH comments on my Amazon deliveries or my farting (which is hardly ever, to be fair) I tell him in no uncertain terms to shut the hell up. When he was manspreading all over the kitchen table in the only communal open plan space in the house, I told him to bugger off out of the way and if his bosses didn’t like it they could build us an extension.
Everyone in the house deserves equal consideration, not just the person with ‘the job’.
You keep talking about him like he’s a good, decent, lovely man. But is it really not registering with him that you’re pounding the streets with your daughter every day so he can zoom in peace? The priorities are all wrong. But you seem very reluctant to point this out to him.
Is it that he actually could work in the bedroom but you daren’t push the issue because he refuses to do it? I don’t understand why you wouldn’t just explain why the bedrooms are a no go and save yourself loads of frustrated posts in response to the same question. Unless you’ve got a sex dungeon in there, or an illegal puppy farm or something, I can’t understand why he couldn’t just shut himself in the bedroom for a couple of hours while you have a mate over or catch up on Love Island while DD naps or whatever.
If you feel you can’t raise any of this with him then of course that’s a different issue.
But it’s weird that you’re not angry with him - despite his selfishly dominating the living space and his obliviousness to the impact on you and DD - but you’re angry with posters on this thread for asking perfectly logical, obvious questions, the answers to which might help you.