Its like for every suggestion, you have a reason it wouldn't be possible.
You can't do 9-5 as the commuting hurts your foot. But won't take a break in the journey yourself because it makes your day longer.
So they suggest 7-3 but that's too early because you get tired (understandably tired).
You want to know what you are doing 3 weeks in advance but you are only going to be there for 4 weeks.
You can't stay in one position for long day they suggest a mix of duties, some sitting, some standing, but that's too much variety for you.
You can't use a bread machine in case you cut your fingers because your are tired.
You can't do anything that involves you bending right down.
Or lifting
Or sitting
Or standing.
Most of us on this site have been pregnant. Many of us have had very difficult pregnancies (me included).
If you had a PE then yes you should take it easier, but thankfully you didn't. If something is painful, then stop and tell them, and if you've been advised not to lift by your dr/midwife then don't. Otherwise there's a certain amount of just gritting your teeth and getting through the last bit of pregnancy.
At least it's your first and you don't have to deal with a toddler as well as work, or do it all with a 2yo perched on your bump.
It shouldn't just be about what adjustments they can make to help you, but what ones you can make to your own life to help yourself. Drive to work early and have a nap? Have a nap at lunch? Register to do things that you've been told not to do? Go to bed earlier.
I totally get it when pregnancy complications totally incapacitate, but honestly that doesn't seem to be the case with you. I think you just want to be done with work now and want them to sign you off on full pay.