I don't know. Probably a fashion myth. The styles of clothing were all very similar. Women wore long gowns with petticoats, but casual fabrics like cotton were more widely available. Louis heels definitely were popular in the US colonies, especially in black or red.
I had a look at the MET Museum online collection of 18th century clothing of American origin. No robe à la français, but I did see examples of robe à l'anglaise and robe à la polonaise in different fabrics, including cotton and silk. There were multiple kinds of dresses that were popular back then.
Wow
https://www.metmuseum.org/art/collection/search/159201
Mr Blue Sky please tell us why
You had to hide away for so long?

Wasn't Williamsburg settled by British who were mortal enemies of French, so French inspired shoes and gowns not ok

I have gone several times!
Id dress up if I found high quality costume that fit correctly.
When you realize how perfect everything is you will tilt your head back and laugh at the sky - the Buddha

Have you gone there before? Would you dress up?
Mr Blue Sky please tell us why
You had to hide away for so long?

I live 5 mins away from colonial williamsburg
When you realize how perfect everything is you will tilt your head back and laugh at the sky - the Buddha

Jealousy
Mr Blue Sky please tell us why
You had to hide away for so long?