Six card Omaha is available at PokerStars and PokerStars.eu
In 2019, PokerStars team experimented a lot with the game formats. At the beginning of this year, PokerStars announced about the launch of 6-card Omaha, and also it returned the Fusion tables.
However, as it turned out, 6-card Omaha is already available in PokerStars.eu client, as well as in PokerStars global version.
In total, 12 Omaha 6-0 tables are available in PokerStars (there are 11 tables in PokerStars.eu). The limits of this format start from $0.05/ $0.10 to $50/ $100.
In order to play 6-card Omaha, you should play at PokerStars.eu or PokerStars for real money. Also, you should enable Aurora graphics engine in the settings.
Given such implementation speed of this game format in European and global version of PokerStars, it is likely that 6-Card Omaha will very soon appear in all other versions of this poker room.