Logitech Webcam HD C270 not properly recognized by macOS
Many Logitech webcams have only the bare minimum support on Mac. From their descriptions…


  SYSTEM REQUIREMENTS
  Compatible with:
  Windows® 10 or later, Windows 8, Windows 7   
  
  Works in USB Video Device Class (UVC) mode with supported video-calling clients:
   macOS 10.10 or later


The only way I've ever been able to leverage any better behaviour from mine was to get WebCam Settings available from the App Store at $8. There's no free trial, so you'd have to take a punt, but the C270 is listed as supported.

From comments - apparently Logitech do now make software for Mac support.
The C270 can use the Camera Settings app.
My older C920 has a beta Logitech Capture

You are probably best going through from the front page for your own camera if it's not one of these, to see what's specifically on offer.