I'm also having the same issue. Although I think mine is a scaling issue vs. a dimension issue? I want the PT to fill as much of the viewport as possible, but it's either too big or too small. I've messed around with a number of code options as well as the PT setting within Figma, no dice. The device frame itself isn't showing up either. I wonder if it has to do with the overall height. I set it that way so it would at least scale up to a viewable size. Any takers on advice?