Carry-Forward Reviews?

Sometimes when I’m reviewing (not editing) a PR, I want to leave notes about stuff to clean up in subsequent PRs. My company does a lot of feature-flag-based deploys, which helps us gather real-world data about how a feature is performing, and often it’s better to trade off some technical debt for early learning rather than holding up a deploy, and then fix that technical debt in the next round of PR. I could see this being really useful for time-shifted teams. Is there a technical solution for this other than comments?