Flatpak-trash-remover
Script removing folders with no corresponding Flatpak app installed. Removal is interactive.
Usage:
wget https://github.com/trytomakeyouprivate/Flatpak-trash-remover/raw/main/flatpak-trash-remover -P ~/.local/bin
chmod +x ~/.local/bin/flatpak-trash-remover
flatpak-trash-remover