The Better Lily Pads Mod (1.19.2, 1.18.12) is a simple mod that makes lily pad smarter and allows blocks to be placed on them. Clicking on a lilypad with an item can cause it to move to the water block below. This will make it a waterlogged block. It will return to its vanilla state if the block above it is removed. This can only occur if the block below is a waterblock.