I've been maintaining a spare phone running lineage os exactly in case something like this happened - I love the apple watch and apple ecosystem, but this is such a flagrant abuse of their position as Maintainers Of The Device that I have no choice but to switch.
Fortunately, my email is on a paid provider (fastmail), and my photos are on a NAS, I've worked hard to get all of my friends on Signal. While I still use google maps, I've been trialing out OSM alternatives for a minute.
The things they've described are in general, reasonable and probably good in the moral sense. However, I'm not sure that I support what they are implementing for child accounts (as a queer kid, I was terrified of my parents finding out). On the surface, it seems good - but I am concerned about other snooping features that this portents.
However, with icloud photos csam, it is also a horrifying precedent that the device I put my life into is scanning my photos and reporting on bad behavior (even if the initial dataset is the most reprehensible behavior).
I'm saddened by Apple's decision, and I hope they recant, because it's the only way I will continue to use their platform.
Have you found any decent google maps alternatives? I'd love to find something but nothing comes close as far as I've found. Directions that take into account traffic is the big thing that I feel like nobody (other than Apple, MS, etc.) will be able to replicate.
Have you tried using the website? I've had some luck with that on postmarketOS, and it means you don't need to install Play services to use it.