Does OR matchups count as regular season games??

Hi global AFL fans! As a european, I Am very confused about this OR round.. It seams like it is a part of the regular season stat games, and These clubs playing in this round, will get an extra bye week doing the season, or Am I lost? I Am confused, as if why they don't just call it "Week 1" IF this round counts in the final regular season picture.

Best regards A