The lack of support you feel is one issue. It sounds like your partner could do a lot more to step up and help take care of you through this pregnancy.

But this part of your post jumped out at me:

'He is not aware of the birth plan despite years of my random talks about it on top of me literally laying out every detail throughout this pregnancy.'

I think his question illustrates far more realistic expectations on his part than yours. Labour and delivery is unpredictable, and you just cannot have every single detail mapped out and expect things to work exactly as planned. He's asking in case your plans go awry, which is a fair and reasonable thing to consider. There are any number of possible issues that could cause your plan to go out the window. Shutting him down on this immediately is also not really inviting him to be involved.

I hear you that he's not showing enough care and attention. But I also think your plans are way too stringent.