let's see, that sand and gravel, etc; cease to exist in oceanic biomes after enabling experimental gameplay.

when it finds the variants of ocean biomes, via gravel in cold oceans, deep cold oceans, etc; and sand in coral reefs, warm, hot, deep warm; BUT!!! When we activate the experimental gameplay, the sand from the oceans simply disappears, and the gravels are replaced by stone, minerals, diorite, andesite, etc; but there are still a few scattered patches of sand and a few scattered patches of sand, but they are very small, the ocean biomes are misunderstood.