I use jpackage to build native bundles for JOSM, an editor for the OpenStreetMap project. As others have pointed out, one of the biggest shortcomings is that you have to use a Mac to build a Mac bundle, etc.

https://github.com/JOSM/josm/blob/master/native/macosx/macos... is my macos script, https://github.com/JOSM/josm/blob/master/native/windows/win-... is the windows script, and for how it moves, see https://github.com/JOSM/josm/blob/master/.github/workflows/a...