Big issues with Xbox live/multiplayer Minecraft PE

Hello, I recently bought Minecraft pe (mobile) and I have been experiencing lots of trouble with the Xbox live/multiplayer sides of things.

Heres what's happening. So when I play singleplayer and I want to invite a friend to my world it's saying I'm not signed in to Xbox live (but I am).

The second thing that keeps happening is I can't use the marketplace at all.

The last thing that keeps happening and is EXTREMELY annoying is that servers aren't working for me.

I am not seeing any featured servers, It keeps saying random error messages like unable to connect to the world, you need to authenticate to Microsoft services, Mojang error -9 you cant use market place, disconnected, or it loads forever. Only twice have
I been able to join a server.

I have been trying to find an answer for a week.

Here are the fixes I tried but haven't worked:

Restarting my wifi/router

Trying to use other phones to play

signing out and signing back in to Xbox live

restarting my phone

restarting minecraft

reviewing my microsoft/xbox online privacy settings and changing some settings

and trying to join different servers.

I played on a different phone with my siblings account and it worked fine but when I used my account on the same phone it stops working.

I really love mcpe and would really like to be able to play so please respond as soon as possible. Thank you so much for reading this!

:)