It took me a little over a year of playing, ~1100 East games, ~400 South games, and several failed yakuman waits, but I finally got one!

Link to the game below if anyone is curious. I Yakuman in East 2 and end the game, so it's short.

https://mahjongsoul.game.yo-star.com/?paipu=230915-dc23ecde-d0c6-46fd-ab4a-bddce5d9e57c_a907387108