US citizens OK to fly to France via Netherlands?
Assuming airlines use Timatic to determine whether and where passengers can fly, it appears that US citizens are permitted (or at least not prohibited) to fly from the United States to France via the Netherlands.
The 5/26, (most recent), Timatic states passengers aren't allowed to enter the Netherlands, then several exceptions, including:
"This does not apply to passengers in transit."
For France, it states "Passengers arriving from a non-Schengen Member State are not allowed to enter." and does not address the nationality of passengers permitted/prohibited.
The French travel certificate certificate previously required for entry from third countries does not need to be completed for flights from EU countries.
https://www.iatatravelcentre.com/international-travel-document-news/1580226297.htm
So, if timatic is the final arbiter of who can fly from US to France, it seems it would be possible for US Citizens to fly to France.
Of course there may be entry regulations once a US citizen arrives in France that may prohibit him/her from entering, but by a plain reading of the current published rules that airlines use, what indication is there that US citizens are prohibited from traveling to France via the Netherlands?