I recently tried to add my son and daughter as family members to my goggle account, so we can share YouTube Premium for music and ad free YT. IT was a disaster, really. In the end my kids are now both a lot older than they are to make it work.
iOS on the other hand just works. Backups are a thing, family sharing works great (if you ignore in app purchases...). My son uses an old iPhone at home, he can FaceTime with it, write iMessages to family members, enjoy some apps I bought and I could restrict and control him if needed. After using the Google Family app website and app, yeah, good luck with that lol.
I also bought tons of stuff over the years, and they can just install all of that.