europe – Experience Entering France from the UK with US Passport?

Anyone with a US passport who has recently traveled to France from the UK by way of rail, bus, car or air, care to share your experience entering France and whether or not it matters if you quarantined in the UK for less than 14 days after arriving from the US?

Nothing says US citizens entering France from UK is disallowed. Save yourself some time if you are going to post about false information.