The Flatpak is already packaged and works well. It just needs to be maintained from a person that joins the Inkscape community.
This would allow further improvements like Portal support and making the app official on Flathub.
Update: One might have been found!
There’s also Pied, which hasn’t gotten around to submitting to Flathub.
Wow, cool app!
That was my first thought upon finding it. It’s really hard to find though, even if you know the name of it.