It's been a while, but one my top favorite mods for FO4 was SimSettlements.
I liked it because you'd plop down a blueprint for a plot type of your choosing, like dwelling, medic, store, whatever, assign someone to it and the settlers would build* it? (might be misremembering that part) There's "exterior" plots that are buildings of that chosen purpose and "interior" plots, if you wanna add some life to a building you've already built.
Fully furnished stuff that I wouldn't have taken the time to do, but gave it... life.
It gave me reason to return to settlements: "Hmm, I wonder how that new spot turned out".

Plots could also be upgraded and you'd come back to a newer, better version.
Basically, it transformed the chore of settlements into something more interesting and dynamic.

Sure, I could always do a few things myself without it, but eventually with the amount of settlements, some would inevitably end up being a boring square foundation dormitory with a few turrets.

That and whatever mod made it so settlers would defend themselves without always needing your help to route one single bandit despite having 25' fortifications with a million turrets.

For some reason, when Fallout 4 VR released it used an older version of the engine and I didn't wanna bother with making all this work.