Re
First of all , I discover Joplin, I am not a developer and I don't speak English very well. If I understand correctly there is no uservoice to give an opinion/vote on the requests?
If not I just tried again by rereading your post and it works.
In a Joplin file, I put
Joplin.AppImage
Joplin.AppImage.home
I must have made a mistake by trying to copy a folder under .config and renaming the others.
I recognize that not all developers have adopted the standards because I am switching appImage applications to the portable version. Some work with .home or .config and some don't work at all. I notice different behavior, it's a shame 