Where are my aircraft purchased from the 2020 marketplace in 2024?

You’ll just have to wait.

I’ve only had the MSFS 2020 Premium Deluxe and Deluxe pack come through into 2024, no FF, LL, or 3rd party aircraft.

It’s a fairly safe assumption that they have serious problems with the conversion process, and also the distribution, going by the conflicting experiences people have posted since release concerning these a/c.

How long it’s going to take them to fix it is anybody’s guess.

Even so-called native 2024 versions of 2020 premium deluxe a/c are badly broken Zlin Aviation - Shock Ultra - no speed indicator - #21 by SmotheryVase665