Daylight detectors can't be waterlogged, which is inconsistent with other redstone components that can be waterlogged (and also make logical sense to be), such as: rails, sculk sensors, trapdoors, trapped chests, and lightning rods (see attachment 1)

This fix would allow for aesthetically pleasing depth sensors, making use of daylight detectors to work out the change in light level as the water level deepens, without the sensor creating a jutting out air bubble. (see attachment 1/2)