OneTagger Flatpak Request

Could somebody please Flatten OneTagger, the ultimate cross-platform tagger for DJs?

Project information: Cross-platform music tagger. It can fetch metadata from Beatport, Traxsource, Juno Download, Discogs, Musicbrainz and Spotify. It is also able to fetch Spotify’s Audio Features based on ISRC & exact match. There is a manual tag editor and quick tag editor which lets you use keyboard shortcuts. Written in Rust, Vue.js and Quasar. MP3, AIFF, FLAC, M4A (AAC, ALAC) supported.

Name: OneTagger
Homepage: https://onetagger.github.io/ & GitHub - Marekkon5/onetagger: Music tagger for Windows, MacOS and Linux with Beatport, Discogs, Musicbrainz, Spotify, Traxsource and many other platforms support.
License: GPL-3.0
Upstream has been contacted: Yes. Unwilling to support any packaging formats. Distributed as an executable binary only. Universal Linux package support? · Issue #232 · Marekkon5/onetagger · GitHub