In case you missed here is a letter to Google and Amazon on the blocking of domain fronting by Senator Rubio and Wyden:
https://www.wyden.senate.gov/imo/media/doc/Wyden%20Rubio%20Letter%20to%20Ama...
Press coverage:
https://www.cyberscoop.com/domain-fronting-ban-letter-ron-wyden-marco-rubio-... https://www.accessnow.org/access-now-supports-bipartisan-questioning-of-goog...
~ A.