Almost every backports PR has at least one commit that isn't a cherry-pick from a PR merged to master. The most obvious example is external stdlib bumps - the bumps on a backports PR aren't cherry-picked from a bump on master.
For example, in the 1.12.5 backports PR, SparseArrays was bumped via a PR made directly to the backports branch; it now lives as a commit on the backports branch.
There are other examples that aren't stdlib bumps. JuliaLang/julia#59917 is an example (IIUC) of a PR that was made directly to backports-release-1.10; it isn't the backported version of another PR.
Currently, these "manual" PRs don't appear in the PR description that is automatically generated by the Backporter script. I think it'd be nice to include these PRs somewhere in the description, to make it easier for folks to figure out what exactly was included in any given Julia patch release.
Would it be possible for the Backporter script to identify commits on the backports branch that don't have (cherry picked from ...), and generate a list of those commits, and include that list in the auto-generated PR description?