I have Blender 2.91, so it is slightly different, and I’ve been able to adjust everything else, so I’m not sure if I just missed a step somewhere, or if the functionality is radically different and I need to research elsewhere. When Grant is unwrapping, he is able to deselect models in the right hand window (editing mode), and able to solely focus on single parts of the unwrapped model, with those parts becoming selected on the right hand window. However, every time I deselect my model, the entirety of the UV editing section on the left window completely disappears. I have the linked by seams option selected, and I can select sections of the unwrapped model using L, but everything is still selected on the right hand window.
Am I doing something wrong?