Users were previously able to look at personal views on the field service mobile app. They did sometimes have to log out & back in to see them, but now they are no longer supported in offline mode. We have a client that every single one of their mobile techs build personal views for their bookings and it's not reasonable to build that many system views because then everyone has to scroll through the long list. This is important functionality that has been removed from the application and a disadvantage of the field service mobile app.

https://learn.microsoft.com/en-us/power-apps/mobile/offline-capabilities#supported--capabilities