Just bought the whole package, but for most of the packages I only got the Godot 4.3 demo, and not the tilemaps (expected .png) themselves?
there are many folders containing .png filesI had the same problem. The default windows zip extracter fails on contained files whose total file path is too long. One fix is to rename the .zip file from "Hana Carake - Fantasy Interior.zip" to something short like "H.zip", then extract and it works.
(Alternately, just hit "skip" when extracting all the too-long files, they seem to be mostly cache files that don't need to be in the folder anyway.)