Dependabot now supports groups to update multiple packages in the same PR.
https://github.com/flutter/packages/blob/main/.github/dependabot.yml

Grouped version updates for Dependabot are generally available
Docs for groups

Ideally it would mean all the, say, gradle updates could happen in 1 PR, instead of 1 PR per package:
flutter/packages#6661
flutter/packages#6662
flutter/packages#6663
flutter/packages#6665
flutter/packages#6667
flutter/packages#6669

This would reduce the number of incoming commits to the packages repo, and reduce the review burden for keeping dependencies up-to-date.