Not necessarily a tree that needs shaking
not necessarily but may be something OP could think about if she wants to go back part-time? or even full time.
The thing for me is this: so many women get stuck into being a SAHP unwillingly (not saying this is true for OP , clearly she wants to) or going part-time. And part (a huge part) of that is because people don't rock the boat a bit. Men in my company (not UK) take a few months or weeks parental leave at a time, and it is celebrated. Women tend to take a year ML (they could take more) and then come back so they can keep career progression going (it's a good employer, there is flexibility i wish i'd had when my DCs were small).
This happens because people rock the boat, and don't buy into the expectation that "well he earns more" (because historical reasons why men earn more).
As it happens i was the higher earner for many many years. DH had either precarious jobs, or high-stress for relatively shit-pay jobs (it's his industry to blame - also that is improving now we're approaching retirement). But it meant that i was under a LOT of pressure to keep my job, work overtime back when i got that paid, and get promotions (and then no overtime paid but the hours were the same). Don't underestimate that pressure. Looking back now i can identify the exact point where i was very close to a burn out and shouted "STOP!".
Having a SAHP works only when both partners are on board, and there are clear expectations around responsibilities, free time, money etc. In OPs case - the DH isn't on board, and frankly, i don't blame him. At least wait until he is over any probationary period or the shiny-new-job-glow before major decisions are made.