I can't find any lushcaves in 1.18

In the new 1.18 update (Caves and Cliffs) I can no longer find any Lushcaves. The only biom i can find underground are Dripstone and normal caves.

What I expected to happen was...:

 To find a lushcave.

What actually happened was...:
After playing for hours i couldn't find any. then i went into spectatormode and even there i could not find any lushcaves. Only the dripstone and normal cave biomes

Steps to Reproduce:
1. I create a survival world in 1.18
2. go explore the caves to find a lush cave...
3. No lushcave found