OSTechNix published a tutorial on how to migrate from Snap packages to Flatpak in Ubuntu using Unsnap.

Migrate From Snap Packages To Flatpak Using Unsnap

Migrate from Snap packages to Flatpak with Unsnap. Created by ex-Snap developer Alan Pope, Unsnap makes the migration process quite simple!

Migrate From Snap Packages To Flatpak Using Unsnap - OSTechNix