I tested on Xiaome Redmi 9, Samsung Galaxy J2 core and Samsung Galaxy J4+.
The only one that worked perfectly was Galaxy J4+.
I attached two screenshot with just one in English (Ps. the text in the screenshot Redmi 9 are in pt_BR).
Redmi 9 The object doesn’t exist in the path “/org/gtk/vfs/mount/1”
I own Redmi phones…which I can speak about…they are working good for me to backup files (gallery files mostly) you have to pick from notifications a menu and change the default charging option for one of the other 2 ( Transfer files - Transfer media (PTP) ) then you will have 2 extra options shown in the file manager (apart from Redmi9).