This will have absolutely zero impact. Everybody knows you must use Microsoft products and if those don't comply with regulations, the regulations will have to change...
TBH, i used to work at a bank (and now at an energy company), and anecdotal evidence i have is that no big business use M365 cloud services(2 for 2 now). At least not in the IT departement, even where we have people using access to mash .xlsx together and get actionnable data from it.
[edit] I must add that the bank used azure (as an AWS backup mostly), and still, we had no M365 product installed on our microsoft computer.
I'm not a hater or anything, i do have a FOSS bias, but i try to stick to the facts here.