I have not fully implemented new 2.10.0 API since it's experimental and subject to changes. SP will break in future when Skript will remove the old API.
Tested on :
Paper 1.20.1 + 1.21.4
Skript 2.10.0 ( Not working bellow )
ProtocolLib 5.2.0 + 5.4.0-SNAPSHOT-739
Java 21
Note : For recent Minecraft version, you may have to use the latest ProtolLib snapshot.
Change :
- NMS biome ids are now in a config file since paper 1.21+ support custom biomes
Fix :
- support Skript 2.10.0
Full Changelog: 2.2.2...3.0.0
You can support my work here 
You might also like to see my other plugins, such as Server Keyboard Bridge or SoundSearch.