Despite not being sure what EQMs would post I went ahead and booked an international trip on DL/KLM at the end of July and all my DL flights operated by Delta posted without issue. For the KLM flights the one flight I had was not a codeshare posted automatically. I had 2 flights on KLM which were DL codeshares operated by KLM and those did not post automatically. After calling mileage plan they posted them without issue.