After trying to convert my forge cap's to use cca I was looking for a alternative for a callback for when the component is destroyed
the closest thing I could find is RespawnCopyStrategy which is not what I want

Could you describe your use case ? There may be other ways to achieve what you want, but if you are looking for an entity unload event you can use ServerEntityEvents.ENTITY_UNLOAD from Fabric API.

@AlphaMode does this seem good to you ? https://github.com/OnyxStudios/Cardinal-Components-API/tree/1.20/cardinal-components-base/src/main/java/dev/onyxstudios/cca/api/v3/component/load