OK, here is how I did it.
First, I had to figure out how to actually execute power automate desktop. The executable to call is this one on my computer: "C:\Program Files (x86)\Power Automate Desktop\PAD.Console.Host.exe"
I then created an icon on my desktop that executed this EXE.
I happen to be an old WinAutomation user so I wrote a script with that to click on the icon which then called up power automate desktop and displayed my flows as usual. I continued in the WinAutomation script to move the cursor 2 the run icon for the flow I wanted to execute. And send a mouse click. This was the most challenging part actually. I had to play around with the mouse positioning in WinAutomation because it seems that it's difficult to set the XY coordinates in relation to the Power Automate window itself. Not sure why but I finally got it to point to the right place. The next step in the WinAutomation script was simply to exit the script. Because the power automate desktop flow was now running.
I generated an EXE from that WinAutomation script and I run that on a schedule from the task scheduler. It works fine. You could probably do this with another tool other than WinAutomation but that's the one I used.