The apt version of gimp is not showing up in the snap-store?
Can you elaborate on what you are asking? I’m seeing version 2.10.18 of gimp in the stable channel in the Snap Store:
$ snap info gimp | grep stable latest/stable: 2.10.18 2020-05-19 (273) 184MB -
i think what is being talked about is the snap-store snap …