This doesn’t seem to address building installers, unfortunately.
It creates MacOS packages, Windows MSI, and Linux bundles. Those are all "installers", right?
Thank you for posting this because I had the same question and installers weren't mentioned when I asked ChatGPT what "releasing" is.
It does. This is one of the initial reasons to create such tool. At the moment you can assemble native installers with jpackage (project must be Java based) https://jreleaser.org/guide/latest/reference/assemble/jpacka... or create a .deb file (does not bundle a Java runtime, project does not have to be Java based) https://jreleaser.org/guide/latest/reference/assemble/deb.ht...