Well the MRs in the teams I’ve been working in have been small and mostly atomic. They’re focused on solving only one thing.
The team I’m currently working now in was bad at this before and often bundled way too many things in a single MR. It lead to overly long review processes and was error prone. It was too tough for the reviewer to get an understanding of what was going on.
Since we made the habit to make smaller MRs we have had much less of those issues.