This Unreal 5.3 Gameplay Ability System video is about converting the Enemy Movement functionality shown previously into a Behavior Tree.
We start by creating the Behavior Tree and linked Blackboard objects. Next we create the Random Movement Task and copy the previous Enemy Character BP Code. Lastly, we make sure to run the Behavior Tree and the new Task.
https://dev.epicgames.com/community/learning/tutorials/Wjez/unreal-engine-17-behavior-tree-let-s-make-a-top-down-top-down-shooter