Surface generation of jagged peaks changed between experimental snapshots and regular snapshots. Now every stone block is covered with snow blocks (not just snow layers), which was not the case in the experimental snapshots (for example, see theese screenshots from Henrik Kniberg's twitter https://twitter.com/henrikkniberg/status/1433723910122582041).

Bedrock edition is unaffected by this change, and jagged peaks still generate like in the experimental snapshots.

Here are a few comparison screenshots (seed: 3006516195185472982)

(experimental snapshot 7, note how some of the stone is only covered by snow layers and not full snow blocks)

(Bedrock 1.17.40.21, not all stone is covered by snow blocks)

(Java 21w39a, all the stone blocks are covered with snow blocks)