I clicked the desktop version accidentally now I don't know how to turn it back to mobile version

Just click on you profile their might be mobile version option below settings.

click your profile and youll see it there
(●'◡'●)ﾉ

Nope, there isn't:''''''(((((((((((

if u still havent switched it back just click and story and somewhere on the top bars it should say “new version”, just click that

I finally fixed it, when I closed everything, open and log in again ╮(￣▽￣)╭
Thank you all (●'◡'●)ﾉ