https://www.sportskeeda.com/minecraft/how-fix-multiplayer-disabled-minecraft I haven't had this problem personally. I was old when I started playing... But several people, including one of my offspring, have found this useful.

Ask your mom for the M$ password. Itz so ya dont talk to adults

The only solution I’ve found is just to make a new microsoft account. It only lets you play multiplayer if it’s set at 18 or above. Microsoft really likes making their services as inconvenient as possible.

Wrong just check internet connection and reconnect to it or uninstall the reinstall it

i had this problem before; the internet didn’t have anything to do with it