You say it's concerning, but why? Have you asked what your team thinks? If they are responsible for the code they're maintaining, then they ought to be able to

You say it's concerning, but why? Have you asked what your team thinks? If they are responsible for the code they're maintaining, then they ought to be able to determine their own process for review. From my experience, I have seen issues arise during last-minute code clean-ups that were not even in response to review comments, but I don't think it's worth the overhead of 'yet another process' for everyone to remember unless you can automate it.