Teleporting entities to the end

I'm trying to make a trident (projectile) that when it hits an entity, it teleports them to the end dimension, so far I could teleport myself to the end, but not an entity.
Here's what I know so far:

-It is targeting the right entities, I made a similar procedure that made the entities glow and it worked

-I tried using the switch dimensions block but it didn't work

-I tried placing an end portal and teleporting the entity to it, to then remove the end portal annd placce bacck whatever block was there, but that also didn't work.