xonus the first step would be to follow the link provided by brent. You can request the update there. I'd also recommend flatpak, snap, appimage if you need the latest version right now.
Otherwise, you can learn about packaging through the help center. Once you have the basics, you could look at the package.yml file for Shotcut and use that as a template to update and maintain your own .eopkg on a local repository.
