Chrome Beta Request

Project information:
Flatpak already hosts Chrome stable & Chrome Dev, as well as Chromium.
But it has no Chrome Beta which is different from Dev - not everything in dev lands in next release.
Sometimes I need to test under all three versions, so packaging Chrome Beta would be much appreciated.
Alternatively Chromium Beta could be packaged instead.

Name: Chrome Beta
Homepage: Try New Features with Google Chrome Beta - Google Chrome
License: proprietary
Upstream has been contacted: No