I’m not at my comp with Unreal but:
Here’s the documentation Get Overlapping Actors | Unreal Engine Documentation
But essentially what you could do: OnSphereEndOverlap → GetOverlappingActors (Class = actors you’re checking in sphere)
If array > 0 then you still have an actor of that type overlapping/in your sphere, so don’t set the var to false.
Here’s another thread you could use for reference bp Not getting "Get overlapping Actors" to work - #2 by Mookaroni