With a travel update expected soon the US could make the green list.

iNews in the U.K. talks about how there is a possibility for the US to be on the green list when the next traffic lights update is due from the UK government later in June - " There has been pressure for travel to restart between the US and the UK. Bosses of all airlines that offer UK-US flights and Heathrow Airport last week called for a transatlantic travel "corridor"." iNews - https://inews.co.uk/inews-lifestyle/travel/when-travel-us-latest-news-border-opening-green-list-1053202