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!
!boinc@sopuli.xyz flatpak also needs a flatpak maintainer! Your work would help people contribute their spare computational power to scientific research. If you are passionate about fighting cancer, mapping the galaxy, etc this is an awesome way to contribute to that effort in a very force multiplying way.