Reboot Umbrel machine through network command?

I have a Raspbery Pi running HomeAssistant on the same network as my Umbrel machine. Is it possible to send a reboot command from HA to Umbrel? To be used in case Umbrel gets stuck after an update or something like that (has happened once or twice).

If you could ssh into it. then you can execute the reboot command.
I just started, but I imagine it has SSH, which I’m going to regenerate new keys.

I am going to install webmin on the server side so I can administrate the whole machine.