I've installed Factorio 2 Space Age across multiple machines (Ubuntu 22.04, Fedora 40/41) and cannot auto-update on any of them. Manually checking via "About" reveals "No updates available"

For vanilla games 1.1.x and 2.0.x auto update worked and still work without issues..

My current way to update is to get informed by others I need to update my dedicated server, log in on GOG, download the installer and run it on my current installation (sometimes creating a nested Factorio folder..)

Installation method is the downloadable installer for all scenarios (no GOG Galaxy)