It would be useful to have a hyperlink (perhaps in the "Commit" box) that points to the pull request for the pipeline.
The pull request would be one that is requesting to merge the branch of the pipeline into another branch.
When viewing a pipeline, it's usually part of the process of raising and merging a pull request. Having quick access to the pull request is a convenience (sugar). I've found myself time and time again having to painfully navigate through the Branch link to Bitbucket, and then click another link to finally get to the pull request. In my case having a link directly to the pull request would be much more useful than a link to the branch.
Features like this would delight me, as it would remove friction from simple interactions with Pipelines.