Wynntils
Flatpak on linux incompatible with launchy
It just says "Invalid Minecraft" if I follow the readme instructions and try to use it.
ln -s ~/.var/app/com.mojang.Minecraft/.minecraft/ ~/.minecraft
This command fixes it easily, in addition to the flatpak instruction given already in the README.
The fix here would be to search for ~/.var/app/com.mojang.Minecraft/.minecraft/ as the .minecraft folder if ~/.minecraft folder cannot be found or is invalid. Or just prompt the user to pick the right one, since both can be installed side-by-side.
If you add the possibility to select the folder, that would also enable people to use other launchers like prismlauncher.
For Prism Launcher there are already modpacks like Wynnic Enhancements, and it's not too hard to add your own mods in that launcher. So I would say it's not really necessary for it.
(You can always use Additive + Wynntils + VoW for a good enough experience)
I'd say Launchy is much better intended for the average vanilla launcher noob than a Prism Launcher user.