There are no present requirements coming to the USA this can change. Not sure about Orlando airport but some airports and some city transportation may require you wear a mask, However although it is required you will see a good split of people who wear a mask and those that do not. The only place I have been where if there is a mask mandate in place that everyone was reminded to wear a mask was in fact Disney. NYC although a lot of rules were made has been a free for all since day 1 with the exception of the short lived restaurant vaccine mandate. But it is best to have a mask and wear one if it says required. I would check the UK official rules shortly before you travel to see if there are any requirements to fly back.