NAPS2 - Not Another PDF Scanner

Project information:

Name: NAPS2 - Not Another PDF Scanner
Homepage: https://www.naps2.com/
License: GNU GPL 2.0 (or later).
Some projects have additional license options:
* NAPS2.Escl.* - GNU LGPL 2.1 (or later)
* NAPS2.Images.* - GNU LGPL 2.1 (or later)
* NAPS2.Sdk - GNU LGPL 2.1 (or later)
* NAPS2.Sdk.Samples - MIT
Upstream has been contacted: NO
Github page: GitHub - cyanfish/naps2: Scan documents to PDF and more, as simply as possible.
Flatpak version: Download - NAPS2
Considered flathub not yet submitted: Bring NAPS2 to Flathub.org · Issue #206 · cyanfish/naps2 · GitHub

Interesting indeed, hopefully someone will show up and do it!.

The manifest is there:

Is this everything needed to add it to Flathub, or does this require more files?

Requirements | Flathub Documentation says, that applications using an EOL runtime won’t be accepted and Naps2 doesn’t seem to be updated anymore.

That should make it more easy for someone to adapt and submit.