With Apollo's deeper oceans mod/datapack, Abyssal Chasm generation becomes oddly modified, with the vast majority of what should be Chasm becoming mostly featureless ocean floor that still generates copper habitats, and a few small pits of Chasm generating properly near to the coastline.

Link to conflicting mod: https://modrinth.com/datapack/deeper-oceans/versions

What generation looks like when using deeper oceans:

What generation looks like when NOT using deeper oceans: