After you install a Flatpak app via sideload then all apps from the Flatpak repo you downloaded it from (flathub.org) will show up in AppCenter so you shouldn't need to use sideload for subsequent apps from the same repo. Personally I prefer installing Flatpak apps on elementary OS if you have the room on your HDD/SSD. The advantages are: When you install ...


Okay, answering this rather than deleting it, just in case any other users get this confused like I did. Escalation is not necessary because this is installing apps as the user.

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