Encountered this myself recently. Found a fix. Right click the new layer that you created when georeferencing in the 'Contents' pane and select 'Symbology'. Now, in the symbology menu, open the 'Mask' tab and click to check the box that says 'Display background value'.
Very useful tutorial. Thanks
Is there a way to remove the black "no data" area?
Encountered this myself recently. Found a fix. Right click the new layer that you created when georeferencing in the 'Contents' pane and select 'Symbology'. Now, in the symbology menu, open the 'Mask' tab and click to check the box that says 'Display background value'.