This. It’s sooo frustrating - it’s all very well getting all Beyoncé at the OP but it is not helpful when she has explained the reality of her situation.
the reality of her situation may well be that she is the lower earner in the more insecure position and will be the one to take the hit on her actual job.
However, making plans, sorting out the childcare is for both of them to do, To decide as a family.
And if, as a family, they decide that the DH might be able to build a bit of flexibility in his day to keep the OP working outside the home, then that's fine for them. Other families do it differently.
But OP is giving out the vibe that she's doing all the thinking, arranging whatever and that is absolutely possible for most people whose DH isn't a complete and utter waste of space.
Given the advanced stage of your pregnancy, OP, I'd go back to HR and ask them exactly how they plan to keep you safe, ask to see their risk assessment and try to persuade them that it's in nobody's interest to have you return to the office for the foreseeable.