Join Date: Oct 2000
Location: Munich, Germany
Programs: LH HON, DL FO/MM, Marriott Lifetime Platinum, Accor Lifetime Platinum, Sixt Diamond
Posts: 6,174
DL only gives credit on flights actually operated by AF as well.
So e.g. if you travel to the US on AF16 from CDG to EWR which is aperated by CO, you would not get miles either.
But it states that clearly on the DL website.
But you're right, Frequence Plus would have given you the miles...
Better luck next time!