Hi Hexa, sorry for the delay in responding, no, it doesn't work with GeyserMC, the resource pack is designed for the Java version, there are converters but I have no idea if they really work...
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Supported MC versions
1.19, 1.18, 1.17
Supported server software
Spigot, Paper
Supported languages
The prefixes are in English
Optional Dependencies
The prefixes can be used without any dependency, but it is more convenient to use a permissions plugin (UltraPermissions, LuckPerms or similar)