If you install a mod that added custom dimensions, the custom dimensions won't be generated and you can't teleport to the custom dimensions by command "execute in modId:dimensionId run tp @s 0 100 0".
Plz fix it! It will cause a lot of players remove this mod!

I tried these mod that added custom dimensions:
Agape Space Mod
The Aether Reborn

give a log

give a log

It won't log anything but I tried it in game
You can try it:
Step 1: Install Fabric Season mod
Step 2: Install a mod that added custom dimensions like Agape Space Mod or The Aether Reborn
Step 3: Start the game
Step 4: Create a new world and play it
Step 5: Type "execute in " and it will show you what dimensions you can get to, it only show vanilla dimensions "overworld", "nether", "the_end"
Step 6: Remove Fabric Season mod and restart the game
Step 7: Create a new world and play it
Step 8: Type "execute in " again and it will show 3 vanilla dimensions and the modded dimensions

Just tested this in the latest release and it's working fine. Are you sure another mod isn't breaking your world?

Since no one said anything, and I tested this and everything worked fine, I'll be closing this issue.