I used to think code review was about protecting engineers from themselves. It was always my goal to help keep them from making the same mistakes I made coming up.

But you can't, and it's exhausting. Give them the tools, give them resources, and automate as much as you can. Listen when they have questions, and give thoughtful answers and direction.

That's all you can do, and they'll learn through making mistakes the same way you did. The value is actually being a mentor for when hard problems come and they don't have the experience they need yet.