how to remote shutdown PI4B

As I don't use the Pi4B on a dayly basis I want to shutdown it and then disconnect the power.
But the Pi is headless (and kb/mouse-less) as I only use it for audio.
In the GUI with a monitor/kb/mouse attached there is a shutdown option and that works.
But in the remote GUI I cannot find it.
Is there a way to shutdown the system before I switch off the power?
I have the software installed via the network install yesterday.