Euh.... No!
France has all the knowledge and industrial partners to built a next gen aircraft alone. Dassault for the frame and FBW, Safran for engines, Thales for electronic suite, IRST and radar, Messier for undercarriage, MBDA for Weapons, up to Michelin for tyres, ONERA for air tests... and some others like Rafaut.
The sole french problem is money. To develop and produce alone a 6th gen fighter on the sole French needs (export is never assured) may compromise other weapons projects... But in case of, we have all the keys to do so.
Same for next main battle tank, intended with Germany for the same money reason.
That's what I said:
"Hence all the joint risk-sharing & cost-sharing partnerships in Europe "