Fujifilm menu autofocus settings can make using the camera's autofocus (on the XT4, XT3, XT2, and other Fuji cameras) easier to use and manage. The most important autofocus setting I think is the AF-ON. If you've not yet tried that out for Back Button Focus, give it a go and see if it helps improve your photography.
0:00 Opening
0:46 AF LOCK
2:56 AE/AF LOCK
4:12 AF-ON
5:30 AF-ON With Manual and Autofocus (Back Button Focus)
6:35 Set Up Back Button Focus with AF-C
7:48 Disable Shutter Autofocus
8:29 Closing