For my home lab installs, I use NTlite to cut out all crap, including OneDrive from M$ ISOs.
For my corporate laptop, there is nothing I can do.
And color me surprised when after deleting a lot of supposedly local stuff (somebody had changed default locations) which I had never intended to go into M$ AI harvesters I received a notification that even after I had deleted all those files, the cloud copies would remain for (a very long time) and not just sync the deletions.
It helpfully gave me a URL where I could then delete those immediately.
Then it came back and told me that in fact there was a secondary copy, which again would remain available for a very long time and provided me with another URL where I could immediately delete those files.
I'm pretty sure that there is a third level cache beyond that, because if you're spending so much time to delete three copies, that means you consider that data extremely important, a helpful hint to steer those AI bots towards the truffles...
Yeah, I can't wait for the EU to sink some teeth into that, but I'm afraid that with the potential right shift on both sides of the Atlantic, that might just turn into extra copies for the new political management teams...