The End is still the original default End with only a few ores and sometimes a single ruin from the BetterEndForge mod. But no new bioms, crystals, islands, etc... and the End is still just one Island.

• I have no other mods expect the BetterEndForge 1.16.4 Mod
• I am running forge 1.16.4 - 35.1.37
• I am generating new worlds with this mod on
• The source for the End is 'betterendforge:betterend_biome_provider' and it is that by default

Any ideas on how to fix this? If you like I can provide more information/screenshots.

You need to travel to the end outer islands to see the biomes, the central island (with the dragon and obsidian pillars) has been left untouched

Ah, thank you!