I can't share any screenshots for proprietary reasons, but has the re-run button for GitHub checks been removed? It used to be that you could click "Checks" on a pull request, and there would be a button that you could press to trigger a webhook specifying this run should be done again.
Is this a problem on my end, or has this feature been removed? As far as I can tell, it just disappeared at some point. The documentation for GitHub checks is remarkably sparse and vague, I'm having a hard time figuring out what to do.
Try to close PR and reopen. It worked for me in restarting all checks again.