As much as I love Google (not even a little, my love for that company is negative and becoming more negative per second) I would love to run far far away from it. Here’s another ball and chain I need to break.
Where can I find a simple parental control access system for my phone and or computer that I allow my kids to use?
That only prevents phone connectivity over WiFi. Turning off WiFi and using mobile data bypasses it. Using offline applications and games (or even Plex/Jellyfin etc) can bypass it too.
Family link does more than stop internet access at certain times, it allows setting usage limits by device and by app.