I never knew how to use this website so forgive me if I post this in the wrong section. but i am looking for a mod that replaces the super mutants and protectrons of fo3/NV with the FO4 models. I have seen images but they never mention the name of the mod.

Also where exactly do I need to navigate to in order to search for mods on this site because the search bar doesn't really give me results

alright, i think you're looking for "upgrades from the commonwealth", it replaces a lot of creatures like deathclaws, protectrons, super mutants, etc, with the fallout 4 models.
i don't think that it is on gunetwork anymore but you can easily find it. hope that helps!

Thankyou so much ! I have been looking for this for so long I really appreciate this

you're welcome! i never tried to use it on fallout 3 though, i don't even know if there is a fallout 3 version, in the worst scenario you can try using geck to swap models.
feral ghouls seems to be a bit glitchy (even in new vegas but there is some patches for that if that's an issue to you.  i think you'll find those patches in nexus) and the mod can impact performance a bit, i haven't run into any issues to be honest, but i've seen some people complain about it.
oh, and i don't think fallout 4 retexture mods affect upgrades from the commonwealth, feel free to try though.
happy gaming!