Ive done it aswell just to explain the steps.
1)Very top corner youll see your pfp click it.
2) zoom in so you dont hit the wrong thing.
3) just above log out theres a 'mobile version' click it
4) boom.
Ive done this too and took 10 minutes to figure it out
click on ur pfp on the top corner, then click mobile version
1) top right is your pfp
2) zoom in then click it
3) above log out is mobile version
4) click that
Just realise that i thoughy it didnt send it did sorry for sending two
i accidentally made my thing desktop version, how do i switch it back to mobile