Pull request added to a queue can now see their priority set via the new priority_rules attribute in the queue_rules definitions.

Mergify Changelog

Add priority rules

The queue action moves the pull request into one of the merge queue defined in Queue Rules . Merge queues prevent merging broken pull requests by serializing their merge. Merging broken pull requests can happen when outdated pull requests are being merged in their base branch.

queue - Mergify documentation

Change List