You might wanna check out this link
Not a perfect solution by any means but at least it makes Windows more privacy-friendly if you want to.

Signal doesn’t know your phone number, though. It’s only used to identify other users in your contacts, and not a single thing about it is stored.

2025 was the year I finally ditched Windows and stopped dual booting.

Good on you! And good luck!

I’ve never used it, and now I never will.