Whenever you try to strike a mob with a channeling trident, the lighting from the trident will be redirected to any nearby lightning rods. However, it will NOT send a redstone signal from the lighting rod.

How to reproduce
1. place down a lightning rod and summon a mob to strike
2. set the weather to thunder
3. throw a channeling trident at the mob, and the lightning will be redirected to the lightning rod.

Expected result
The lighting would strike the mob, instead of being redirected to the lighting rod. You can see this behavior on java edition when testing this.