Are you sure its a Limited and not a Premium? In the USA at least, the Limited & Hybrid models came with LED headlight assemblies and the Base, Premium and Sport (2021+) had Halogen headlight assemblies.
It is extremely unlikely the previous owner swapped the headlight assemblies out for from LED to Halogen, since that would be quite a bit more difficult to accomplish. The light assemblies themselves are the same fitment wise, but the wiring/plugs are completely different. There are people who have converted from Halogen to LED on this forum and others, but it isn't a direct plug and play swap without modifying the harness or buying a premade adapter.
I am not sure why Subaru is still selling cars with Halogen headlight assemblies, year doesn't seem to have anything to do with it, only the trim level, for the Crosstrek and Impreza at least.
As for the other lights not being LED, interior, license plate, parking/turn, there are a lot of manufactures (including Subaru) out there that still use a halogen bulb for those.