@OP I don't know which toadies you have been speaking with in your company but I work for Corporate America (not Fidelity) and we were where you are back in 2023.
To get a disability exemption is no easy task. We have disability people on staff (I'm sure you do, too) and you need to submit a request and then you... and your doctor especially... must go through a LOT of back and forth, lots of paperwork. Everything must be compliant with ADA and ultimately they have the final say based on the evidence. I don't know many doctors who would put their a-s on the line just to save you a trip into the office.
It requires a lot of proof, documentation and substantiation. You just can't have your doctor write a note saying you have anxiety and suddenly you are exempt. To put it in Biblical terms, it's one of those 'camel going through the eye of a needle' kind of things.