Ummmm... It sounds like you booked SEA-CDG and CDG-NAP as separate tickets. Huge mistake. In that case, Air France is not obliged by EU law to make arrangements for you to make it for your CDG-NAP flight.
I assume they still gave you one of the three options in [1], but that just didn't work for you.
I assume they still gave you one of the three options in [1], but that just didn't work for you.
[1] https://europa.eu/youreurope/citizens/travel/passenger-right...