Does Google require US accounts to verify age too? I ask this because I set up my phone's google account when I was living in Japan. When I moved back I had to

Does Google require US accounts to verify age too? I ask this because I set up my phone's google account when I was living in Japan. When I moved back I had to switch my app store county in order to use locally purchased Play gift cards. Soon after I stated getting notifications to "Verify my age on my Google account to help them comply with the law". So far ignoring it has seemed to work, has anyone else experienced this? Also what law are they trying to comply with?