I can’t make the grid become visible in the layout view. Kicad 7.0.11 (macOS 11.7.10 BigSur).
I click on the grid symbol and would expect a 2,54/1.27 mm grid to appear in the drawing area. Nothing.
it seems like your grid is currently represented by those white dots. To change it to grid lines go to:
Preferences - PCB Editor - Display Options
and change Style to lines.
Sorry, the dots were barely visible to me.