This presentation from Unreal Fest Europe 2019 covers the process and results of implementing a non-AI fixed-path AutoPlay system for a AAA action game in UE4.
https://dev.epicgames.com/community/learning/talks-and-demos/lR4/a-postmortem-on-implementing-autoplay-in-ue4-unreal-fest-europe-2019-unreal-engine