Author of the post here! Happy to answer any questions.
TLDR: Not all pull requests are the same!
We are working on a way to specify and automate PR workflows so that you can separate the code review and the PR approval/merge steps.
This way you can automate which PRs require code reviews and which don't.
We show how we are using Reviewpad (as a GitHub Action) to automatically merge basic changes and also how to use it to ship PRs ensuring the CI passed.
We have been working with teams doing trunk-based dev and actually applying some of the principles to our open-source repos. This articles walks through how we automate PR merges and reduce unnecessary builds using Reviewpad.