During the first ballot, delegates aren’t polled individually. A rep from each state reads out the totals awarded by that state’s rules. There’s no opportunity for disloyal votes on the first ballot.
That’s why the attention is focused on approving rules and credentials, where delegate votes aren’t bound.
I’m leaving out some details, but that’s the main idea.
What the traitors are trying to do is change that “first ballot” rule. Instead of Ryan and others embracing this, anyone involved should be kicked out of the Republican Party.