Go to the location shown in the video below and copy it.
Create a new function called PlotPoleDistanceCheck and add an output called Blocked and set it to a Boolean.
Add a new input called CheckActor and set its type to Actor.
Create a new local variable called CollisionBlockedL and set its type to Boolean.
Add the highlighted nodes shown in the image below, location at the top of the image.
Using the float value in the PlotPoleCheck you can control the distance that will be checked for overlapping plot pole zones, default value is 1500 (15 Meters).
Go to the BP_PlotPole blueprint and select the BP_GroundCheckComponent and in the details panel set the GroundTraceDistance to 3.