Can't Play With Friends And Can't Purchase Realms

Hello, Dear Mojang. I Am Rameen Dewan (XBox Account's Name IUsedToBeBurger).

So My Problem Is That I Can't Play With My Friend Even If I Can See An Invite And My Friend Is Also Facing This Problem. And I Can't Play On Realms Because I Can't Even Purchase Realms (It Says Outdated Version). But I Can't Even Update Minecraft. I Am On Pocket Edition (Android). And My Version Is 1.16.10 (My Friend's Version Too). If You See This, Plz Try To Fix This As Fast As You Can.

From IUsedToBeBurger.