From the "self-hosted" perspectively, interestingly what we're seeing at Depot (https://status.depot.dev/clyrvud6i57402igofm6jtb7id) is API requests to provision new runners or receive runner jobs are receiving rate limit errors, but without the regular rate limit status HTTP headers[1].
I imagine the GitHub API / Actions control plane is rather overloaded at the moment with the outage.