No. the second in the group played the extra round against a CL drop in that finished third in their CL group. The winners then joined the 8 group winners to form Rnd 16.
Apologies you’re of course correct - I forgot my original point was about the Europa League, and was thinking about the Champions League when responding!
(I already fudging hated that rule about playing CL castoffs to be fair though, haha)