Hello, I just discovered the modpack "Engineer's Life" and it looks very interesting. I saw that it was refused because it didn't have a server pack but now it has!
Here's the link to the modpack: https://www.curseforge.com/minecraft/modpacks/engineers-life
This modpack is a "progression-through-ages" modpack. You start at the stone age and progress through the ages with all the mechanical evolutions.