I am on the same boat. And to me, if the post says that it 's 100% rollout, it include APAC version as well. I contacted Garmin Support team by email almost a week ago, without answer until now.
APAC software updates have traditionally been released about 6 weeks after the RoW versions. 9.20 was released on 19 June, so if Garmin follow past practice, you could expect an update in early August.
The 100% rollout refers to the fact that Garmin (like many software companies) stagger the release of their updates to 20/50%/100% of their user base over about 72 hours.