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.

Does anyone know how could I do this?