I work with a Grub boot for Win11 / Debian on the same disk (work provided laptop without the persuasion to change my employer MS-First policy) but one of the lucky ones I guess. No problem for 2 years now.
Only thing after a big Windows update it forgets its TPM Bitlocker key for its own partition. Must type it like once in 2 months manually.
For Android, Universal Debloater is your friend.
https://github.com/Universal-Debloater-Alliance/universal-android-debloater-next-generation
When developer mode is possible at least.