If you download the Destiny 2 app, all the functionality is in there (transferring items between characters and vault, looking for group for fireteams etc) its just a 'console focused' implementation of these features. Since they don't have keyboards and use voice chat primarily, I feel like this was actually the easier and more logicial way to put these features into the game.
Unfortunately on PC the social features were neglected, it is an expectation on PC you should be able to do these things from in game.
Nonetheless, I've spent countless hours already and completed the raid multiple times so much so that it is almost time to shelve it until December 5th and play Battlefront 2 in the meantime.