More overworld indicator cave biomes like lush caves (sand, ice, water)

The new cave update has been announced, and it looks amazing! The lush caves are a great addition that give you information as to the biome above ground, and I think more types of caves that do this for other biomes would add a lot more variation to the game. For example:

Sand caves could spawn under deserts, savannahs, and badlands.

Ice caves could spawn under taigas, tundras, and mountains.

Underground beaches/lagoons/tidepools could spawn under oceans.

Far too often do I find myself digging myself out of a deep cave system with no idea what awaits me on the surface - these additions would make navigation a lot easier and more exciting!

It would also be cool to see a new mob or two for each biome, like mummies, yetis, or glow squids!