Just got a Pixel 7 Pro, flashed GrapheneOS and went through manual migration of my stuff. All good so far, cheers to the dev team for their work on the OS.
A small UX issue: if "privileged eSIM management" is disabled, I open Settings => Network & Internet, enable this option and then immediately click on "SIMs", the activation wizard doesn't open, all other buttons stop working, and the Settings app crashes shortly after. If I open the Settings app afterward, the wizard opens as expected. Doesn't affect my experience, but you may want to look into it.