So here is another topic about it. Why Roblox removed Premium 450 R$?.
It is odd because Like one of the replies says, if you log out you can see all of the subscription types, but when logged in, not all of them are visible. It is a problem for me because I was planning on getting a premium subscription, but now the option I wanted isn’t available. I live in the U.S. so supposedly they should all be available for me as Roblox is also centered in the U.S. I hope that this is fixed soon.