Enable Edit Layers on world compositor map from older engine version?


I’ve migrated a project from 4.21 to 4.26.2 and I’m trying to get the new ocean feature to work.

Does anyone know how to enable ‘edit layers’ on an existing landscape? I’m using multiple levels in world compositor and I can’t seem to find it anywhere.

I’ve also heard a lot of bad things about the new water feature. Is it worth it or should I skip it and find something else on the marketplace?