I don’t use the ‘Cloudflare Workers’ feature though, but I have received a ‘Welcome to Cloudflare Workers’ e mail.
What steps have you taken to resolve the issue?
Confirmed that there is nothing suspicious in the session and audit logs and tied emails.
Are participation notifications sent automatically?
I don’t recall using the CloudFlareWorkers feature.
And no, it’s not phishing.
I suspect you may have clicked through the Workers tab in your dashboard which stars prepping the environment and begins to create a worker. This process shows up in your audit log but because you never fully created a worker, it does not show up in your dashboard.
However, I’m not sure if this would trigger an email. Check the date of the email to see if it coincides with the audit log records for a worker.