I am very much in the same position right now. My dev team has introduced mandatory code reviews for every change and I can see their output plummeting. It also seems that most code reviews done are mostly syntax and code format related - noone actually seems to run the code or look at the actual logic if it makes sense.

I think its easy to add processes under the good intention of "making the code more robust and clean", but I never heard anyone discuss what is the cost of this process to the team's efficiency.

The value of having more people actually see the code will be there even if it’s just an unnecessary syntax nitpick.

You need to validate things like syntax upfront so that such things don't make it to review to begin with.

I'm not a fan of automatic syntax formatting but you can have some degree of pre-commit checks.