Inconsistency in 'Appear Offline' functionality between Hear

I would like to report a functional inconsistency between titles on the Battle.net launcher. While Overwatch allows players to group up and play with friends while remaining in ‘Appear Offline’ mode, this feature is currently unsupported or non-functional in Hearthstone, specifically for Battlegrounds Duos. I am requesting parity in privacy management across all Blizzard titles. It should be possible to play with a selected partner without being forced to appear online to the entire friends list. Thank you for your attention to this matter.