If I have Premium Deluxe Edition of MSFS 2020 on Steam, and decide to get Standard Edition of MSFS 2024 on MS Store, will the Premium Deluxe planes from my Steam version carry over to my Standard Edition on MS Store?
No. There are no possible transfers between steam and MS Store.
ahh i think i mis-explained
what I mean is the Premium DLC planes I own and the extra paid planes that I own on my premium/ultimate steam version, will these planes move over to the MS Store version?
Because I know if someone has a MS store DLC planes and they buy Steam version of MSFS 2024 then these planes move over to the steam version