It's the "Show suggestions to follow creators in Microsoft Edge" feature.

But that's not the only time Edge has been caught with a feature that sends all your URLs to Microsoft:

https://x.com/scriptjunkie1/status/1152280517972299777 - "Anonymous" statistics sends your Windows SID along with the URL visited for the smartscreen feature

https://www.reddit.com/r/browsers/comments/147rdv4/microsoft... - an Image Enhancement feature sends image URLs to Microsoft

https://www.reddit.com/r/AskNetsec/comments/96nwgd/microsoft... - With search suggestions enabled, search suggestions and URLs entered into address bar go to Microsoft regardless of which search engine is selected (Really, typing http: or https: ought to mean no suggestions generated at all)