libp5x is the modularized Processing 4 and LWJGL renderer library that we use in PraxisLIVE. It’s also available via Maven Central and is fairly easy to use with full Java Processing sketches.
I’ve just updated the examples repository that was mentioned here a while ago to use the new v4 release - GitHub - codelerity/libp5x-examples: Examples using libp5x
Examples have also been updated to use a simple Maven project with wrapper script that should make a useful template for porting other sketches.
Old thread about earlier version at Libp5x examples - Processing, LWJGL, Gradle and Java 11+ modules