Share from Zoom home mirrors entire screen in a meeting - is there a workaround?

At work, there are instances when a Zoom meeting isn’t scheduled and we are meeting in person. When clicking share on the home screen on the Zoom app, it projects a mirror of my screen in the meeting. My laptop display doesn’t seem to allow me to select extend display so that I can treat the projection as a second screen. Is there a way to treat my laptop and the projection in the meeting to be two separate screen? Or, is there a way for me to use the share option on the Zoom home screen but have it give me the picker instead of automatically share my full screen? I want to project a presentation to screen but see notes on my laptop.