Hi EAPflyer,
I also linked my RED by DUFRY card with IB+ card as soon as the partnership was announced, but nothing appeared in my account since my last purchase a few weeks ago.
I can only second craigthemif's comment that official Iberia.com partner page says that avios will post in 60 days:
https://www.iberia.com/web/webPartne...idSector=23119