Software or hardware?
If software …
You are free to use LineageOS, or the upcoming Android 13 version of LineageOS-based /e/OS, or possibly LineageOS-based iodéOS, too, and you will have your hack.
Fairphone support this basically by keeping the phone open to install alternative OSes (not every phone vendor does so).
If hardware …
Yeah, I would have liked a hardware solution, too.