Diamonds Spawn is broken, i can't find any

Hey, the Spawnrate of Diamonds in the 1.17 has massively decreased. I can't find any and that's kind of depressing and isn't fun. I bought a Realms Subscription so I can Play the new 1.17 Update with my Friends. We started Building very much and we don't want to lose this world. But the Diamonds-Bug is Gamebreaking, it's not even fun anymore :/ 

PS: as I found out, I'm not the only one with this problem