The only way this would come up for me is in the area of performance problems and as a way to try to provide accommodations if necessary. Definitely seems weird

The only way this would come up for me is in the area of performance problems and as a way to try to provide accommodations if necessary. Definitely seems weird for it to be a standard question. If you've built up enough of a relationship with folks, they will tend to share these kinds of details. Folks who prefer it remains private won't. That's perfectly okay as long as work is getting done.