Developing a Lightning Web Component.

When initially working on the PC, the Chrome browser displays my form with a FORM_FACTOR of LARGE.   

I would like to test the screen in a mobile size SMALL also.   I opened the Chrome developer tools.  I toggled the device mode to an iPhoneXR.   

While in the device toggle to iPhoneXR the image is scaled down to phone size.  

The problem is that the browser still thinks the FORM_FACTOR is LARGE.   

The size of the screen changes but the lightning component does not acknowledge that the viewable area has changed its display size.

Is there a workaround to this?