Maximum participants allowed on this entry surface.
This numeric value (int32) belongs to FInteractionRuntimeMultiParticipantEntrySurfaceState under InteractionRuntime|MultiParticipant.
Designers configure this value in the owning asset or object details panel, while Blueprint logic can read the resolved value at runtime.
UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "InteractionRuntime|MultiParticipant")
int32 MaxParticipants = 1;