When doing a Critical Hit over any mob in the latest snapshot (25w41a), their corresponding Critical sounds doesn't play at any moment, only the Weak Attack sounds.
Environment
Dealing a Critical Hit over any mob (this time a zombie) with the Hostile Mobs sounds turned off to hear better the combat sounds, in a casual vanilla environment without any modifications or gamerules changed.
The two attached videos are a comparison between the latest version 1.21.10 (first video), and the latest snapshot 25w41a (second video)
Thank you for your report! This is a duplicate of MC-302663.