It says on other requests that the modpack has been added but i can't seem to find it.
If it doesn't work or something I understand but just incase here is a repost of some other fellow.
SevTech: Ages, This modpack is a lot like progressive engineering and age of engineering. But this one is brand new for 1.12.2 has gone through quite a few updates to get it all bug free. I love this modpack for its recipe limiting system, the NEI only shows stuff your allowed to craft rn and any item your not in the right age for you cant pick up and is called Unknown Item instead of the actual name. I love how they use the different mod to make these things work. This modpack is all about realism so when you get in you have to get sticks and rocks off the ground and some flint to make a axe first before being able to actually chop wood!
So I believe a lot of people would love to play this modpack!
Download to server files: https://minecraft.curseforge.com/projects/sevtech-ages