Xojo is a software development environment and is Basic like for multiplattform development of applications. Using xojo inside linux it’s free. Id you try to debvelop for mac, or windows, you need a license which must become paid.
Name: Xojo
Homepage: xojo.com
License: Free(Linux and Rasbery Pi only)
Upstream has been contacted:
The question here is if you have contacted the original developers of the software about this.
Generally, but epecially in this case it is important to know if the developers know this request, and if they would be willing to support the distribution of the software over Flathub.