How to make my game moddable

Have you checked this?

Hello everyone,
I have spent a lot of hours trying to see how I can add modding to my game on UE4. I could not come up with any useful results. I would be very grateful if anyone would share learning resources on modding in UE4.

Yeah I did, I was going to try this one out after a few others.

well there are a few ways to do this i guess.either use that or if u want to make a sdk like how ark SDK is, u will have to modify UE4 Source Code.