TTMSFMXGrid invalidate/redraw cell

Is there a way to redraw a single cell in a FMX Grid or invalidate the cell as per the VCL grid?

I am custom drawing the cell content and dont want to redraw the entire grid for a single change.

The default behaviour is that cells are painted inside the grid, so there is no way to redraw a single cell. You need to call Invalidate or BeginUpdate/EndUpdate to redraw the grid.