Not a bug report, but definitely feedback, as of iOS beta 6.0.7.29 on iPhone X.
One thing that has been a real hindrance to using the new tab view as I would like is the way that the "Notes" documents work. In order to edit a note, I have to click on a specific entry in the notes document and open a modular screen to enter anything into it. This is very cumbersome, as you cannot swipe to any other resources without first closing the note.
In my ideal workflow, I would like to be able to have a note entry open in one tab be able to two-fingered swipe back and forth between other resources to take notes without having to close and reopen the entry. This has been my workflow on my laptop for years, and I would use this A LOT MORE on my mobile device if I could do that.
I think I've caught wind of some "improvements" to Notes coming down the pipe at some point, but would this be a part of it?