What's the issue you encountered?

I am playing on a single player 1.20.1 forge install.
I installed Biomes O' Plenty mod, as well as GlitchCore and Terrablender and moved all three into my mods folder. When I loaded minecraft all the mods were shown and there were no errors, but when i created a single player creative world, there were no blocks or biomes from the mod. when choosing the world type there was no choice for a BoP world so I set it to default.

How can the issue be reproduced?

I am unsure how reproduce this issue as i am unsure what is causing it.

Logs

No response

Mod Version

19.0.0.96

Additional information

My computer's operating system is Endeavor, if that effects anything.

Made an account to say I'm also having this issue. I've been trying to get it to work in my private server for 3 hrs now. I have BOP, glitch core, terra blender, and the fabric API all installed in my server mod folder. The server started up with no issues, but there's no new content in my world. I even changed the level type and installed the files directly into my game mods folder, and still nothing...

Everything is updated to 1.21.8