OP, can you 'just' (I say just but it took me 7 years to reach this conclusion) reciprocate back to your mother a relationship of meaningless small talk about the weather.
Any intrusive questions such as ''are you going through the menopause?'' if you dare to maintain your boundaries can me met with ''uh, I think I misheard you!........'' and wander off, take a call, make tea, go to the loo.
If she does something really insensitive, ie, the one THING, the precise thing you asked her not to do, say ''ah well, you did the best you could, you tried your best''.
My mum has got a little bit better since I served meaningless bland banal back to her with such willingness. For years I tried to get her to SEE my point of view, understand how I interpreted her actions. It never worked.
I might add, my mum is nice to me when she's not conflicted iykwim. But if she needs to please/impress/serve somebody who matters more than I do she can be very ruthless it seems to me. But she has got a little better since I have distanced myself from her and expected zero. She feels it but doesn't know what it is seeing as she is the one who has put her hand up and refused to HEAR me so now that I never attempt to be heard, she is a little on the back foot.