So trying to figure out

I keep finding conflicting posts all over the internet. Does this inherit activation nodes from the game so you’re able to play in RDR2 story together with this? Or is this just a basic framework that is used to ‘build’ a server experience? This page itself has no straight forward “What this is”, as far as I can tell. Or if it does, can someone point me to it? I’d like to set one up if possible.

There’s no way to play RDR2 story mode, co-op or not, through RedM. RedM is just the game engine with multiplayer support essentially. You will have to create any and all scripts you wish to use or reference others from sources such as GitHub/Discord.