What is the mod and for which platform is it for
FallFlyingLib is a library I made and maintain which makes the elytra compatibility between all mods easier, whilst adding a comprehensive pipeline for most mods to tinker with.

What feature(s) is in conflict
Netherite Elytra does not work with FallFlyingLib.

Would you please consider using FallFlyingLib to solve the compatibility issues with other mods which use FallFlyingLib? It's a really easy API.

If you want an example implementation: https://github.com/CafeteriaGuild/FallFlyingLib/blob/master/src/main/java/net/adriantodt/fallflyinglib/impl/support/VanillaSupport.java