In my project I used Get Hit Result Under Finger by Channel. For me, in shipping mobile build, It works only with Visibility channel, so always try to check everything in shipping configuration.
So, here is how it works. This function called in Tick and applies point damage to anything was found:
Then, interactive actor, that is expected to be hit by this, takes applied damage and calculates its collision UVs. Of course its static mesh component blocks Visibility channel.
