Some world types are missing

This can result as "Cannot Reproduce" or "Invalid".

Can confirm, not even a mention of it on the changelog.

I can also confirm this behavior. Here are some extra details regarding this issue.

The Bug:

"Amplified" and "Large Biomes" world types appear to be missing and can no longer be used.

This issue was not present in 1.17.1.

Steps to Reproduce:

• Navigate to the singleplayer menu and click on the "create new world" button.

• Now hit the "more world options" button.

• Cycle through the world types that you can use, by constantly clicking on the "world type" button.

• → ❌  Notice how "Amplified" and "Large Biomes" world types appear to be missing and can no longer be used.

Expected Behavior:

The expected behavior would be that "Amplified" and "Large Biomes" world types are not missing and can be used, just like in 1.17.1.

It's normal that they're not there. They got removed in the Experimental Snapshots, and because those changes got ported into the normal ones, one can assume that they're not present in there either.

I heard some rumors about amplified terrain getting removed, this imo would make no sense as all you would need to do to keep the amplified like terrain in 1.18 is to keep the "Facor" value very low as stated in 51:20 in henriks video about the new generation

Pretty sure that was written in the patch notes for 1.17.1 in minecraft wiki

Fandom's "Minecraft Wiki" is not an official source of information.

Fixed in 1.18 Pre-release 1.