It does tell me. Zypper tells it outright and you’ll get a list with zypper ps -s. But like said, it’s very rare that you need to actually reboot. Restarting apps or services suffices.

I’m doing a lot more restarting on Linux than I ever need to do on Windows

Don’t know what’s up with that. With Windows it nagged about rebooting constantly. Seemingly every update. Meanwhile Linux can be just fine without, some stuff you need to restart but actual reboot is much rarer.