@salixlucida This has countermeasures. At the moment you can simply lie about your age, then de-google the phone to block future updates to the Google Play Store or Google Play Services that will presumably demand ID.

Google could legally demand a birthday only to set up a Google Account for a phone as these laws demand age verification "at account formation." You can still skip making a Google account, so if Google wants a birthday anyway that's data harvesting not legal compliance

Another that will keep working is to buy a used device predating this over Ebay/Craigslist/whatever and factory reset it. This should wipe out any Google Play updates, though base OS updates will remain applied. Since underlying Android is open source with closed drivers, it's not a good place to try to hide age/identity verification code. Reset it, do NOT tie it to a Google Account, then de-Google it.

Be sure to get something old enough to have a removable battery, as original batteries will be on their last legs. Also be advised that BLU phones and probably other cheap imported phones often don't last even after stripping out factory malware. I've seen heatsinks cook off, display failures, RAM issues, the works,