It says it’s compatible with byg. But the end only generates byg biomes and won’t generate better end biomes. It does however generate the ore and blocks better end adds to the main spawn end island. What am I doing wrong? Thank you.

Use this in import settings (copy an paste into notepad and save as a .json)when creating world to get BYG, BOP, and Better end to all spawn yw (Just change seed to what you want).
https://pastebin.com/2JyaSjEr