My earlier submission on this topic was closed and merged with a bug report that tail letters were missing from default aircraft post SU12. My subject matter is entirely different. Default registration letters do appear on aircraft that I select but they are default registrations whereas prior to …

Customising Tail Letters and Call Signs

XR219 March 29, 2023, 8:21am 2

Its related to the bug report that they merged your original post into. Its a known issue atm.