The staticmeshactor is probably firing, because, the Jet is moving, or I’m assuming it’s moving. The Box, Sphere, Capsule Collision objects, do work differently, and the “Sphere” in this case, will need to look for what is overlapping it, The Box, Sphere and Capsule, are being derived from the Primitive Component class. That can easily be done on a per tick basis (or use a divisor, if you don’t want it per tick), when the tick fires, just do a Get all overlapping actors, filter it to your needs, and get on with getting on!
Have a great day.