So I just discovered that it is actually possible to use multitouch on touch screen pc with bluestacks 5.
Now I can finally pinch in to zoom in and pinch out to zoom out and with two fingers I can move the scene just as you can on a Tablet.
Click on game control, then Controls Editors (image 1) then Zoom (image 2) then save (image 3)
Then you should see Scheme and the name you saved your custom setting in my case the default Custom name (Image 4)