RC failsafe in Fixed wing mode

How do VTOL’s handle failsafe with RTL? Will it fly back home at the set RTL alt and then transition when it gets close to the home point then land? I haven’t found anything really explaining the RTL operation for VTOL vehicles, and how it handles an RC failsafe… I want to really only use the 900X ground station, and not even use the RC remote at all! I am trying to do all autonomous flights end to end