There are or have been them on pokerstars but have only rarely seen them recently, but I think they should still exist. But since my information may not really help you, I hope that there are still a few nice people from the forum who can answer this question for you
PS means Pokerstars, right? But Omaha isn't my thing anyway. Thanks for checking!!! I will continue to look for any and meanwhile play the ante-Tournament at unibet.