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I don't get what's the problem.
Please be more specific, at least provide links.
If I understand correctly:
The "Enhancement (Fabric)" mod isn't even available for Quilt on Aternos?
https://aternos.org/addons/a/cursequilt/enchancement it doesn't have its requirements to work or even start the server
Enchancement doesn't have bookshelf and the rest of its needed api's.
Good to hear!
Hello Aternos Employees, I Was Wondering why cant I find fabric mods on quilt mod loader even though quilt supports fabric because since I always add fabric mods to quilt why cant on Aternos? if you don't trust me try it yourself
Thank You For Your Time 
Alright, I will look over some fourms to see why.
Hello, Hopefully you can help me out a bit because on GitHub (it also includes Minecraft mods and plugins) Skript 1.18 is available and I wanna add it to my server. But I know you need a modded website but can you add skript 1.18 or add upload file so we can add mods we want into Their server. And Have a excellent day and I am looking forward to your responce! 
