So on PC you can access the vault from the catacombs. Is there a command i can use while on mobile to do the same?

If not then if i leave my game state the same and log in from a computer will the items pending remain or do I lose them when switching?

On mobile you cant get vault from cata. Must be in town. And yes if you switch from mobile to pc without leaving the game on your mobile, you should keep everything as is

I feel like there should be a button like there Is for prof or inv

unfortunately i got disconnected and all the items disappeared, oh well. maybe the vault hotkey will be added in future updates for mobile users.

oh wait no, if youre talking about drops from monsters, yeah i dont think that will stay in there while you swap over.