When Hushbringer is in play and a card like God-Eternal Oketra gets destroyed, it wont trigger, right ?
Is it a death trigger or is it a trigger happening in the graveyard as a replacement or somewhat ?
But it still triggers when it gets exiled, right ?
You are correct on both counts. The God-Eternals have "dies" triggers as well as "exiles" triggers. Hushbringer will stop the Dies trigger from triggering but won't do anything to the Exiles trigger.
Is it a death trigger or is it a trigger happening in the graveyard as a replacement or somewhat ?
But it still triggers when it gets exiled, right ?