I've found it:

In a press release from 2023, Etihad states that Eurobonus members will earn miles/points on all flights of the whole Etihad network:

"Etihad Guest members will earn miles when they fly with SAS and vice versa for EuroBonus members, and this facility is now being extended to all flights across both airline networks."

https://www.etihad.com/en/news/etiha...-deal-with-sas