Today I had to manually check for updates again to be able to upgrade to the latest firmware version, which was released a couple of days ago ( QTS 5.2.5.3145 build 20250526), although I haven’t changed the settings you can see in the original post: It should check, daily for new firmware and notify my.
The firmware update screen said it last checked on May 25th.
btw, thank you, QNAP, for killing the old community, where I’d probably would’ve gotten a response by now for my original post.