From my experience with bootcamp people, it leaves them woefully underprepared. But my sample size is small: 3 people, 3 separate bootcamps, similar results. They knew one portion of react, no fundamentals.
And sadly a couple of them really took to using Copilot. So they don't know how to do what they're doing and couldn't explain their submitted code.
Just the worst of all worlds there. They were effectively incredibly expensive Copilot subscriptions (not to belittle them, they did that themselves)