Since Minecraft 1.21.2, the ASM library was added to the game. Although, the version that was added is ASM 9.3, which is not even compatible with Java 21 (only up to 19).

Would be nice to upgrade it to ASM 9.5 at least (latest is 9.7.1).

https://asm.ow2.io/versions.html

I don't know exactly what is using it in the game, but it may not work properly.