https://github.com/OnyxStudios/Cardinal-Components-API/blob/master/cardinal-components-block/src/main/java/dev/onyxstudios/cca/mixin/block/common/MixinThreadedAnvilChunkStorage.java

and

https://github.com/OnyxStudios/Cardinal-Components-API/blob/master/cardinal-components-chunk/src/main/java/dev/onyxstudios/cca/mixin/chunk/common/MixinThreadedAnvilChunkStorage.java

have mixin conflicts with
https://github.com/qouteall/ImmersivePortalsMod/blob/1.16/imm_ptl_core/src/main/java/com/qouteall/immersive_portals/mixin/common/chunk_sync/MixinThreadedAnvilChunkStorage_C.java#L120

Solution: Mixin allows injecting into an overwritten method. I am going to change my mixin's priority to higher and ensure that vanilla calls of sendChunkDataPackets won't get intercepted. Cardinal components need to change cardinal-components-block/MixinThreadedAnvilStorage's injection point to RETURN

Ah, I already had a fix for this - fc0971e
But your solution is cleaner so by all means, go ahead.