After much anticipation, Kiriko was finally added to competitive mode on Oct. 18 — though that doesn't mean that every player will be able to use her in a match.
In Overwatch 2, players have to either purchase the battle pass to unlock all of the playable characters or grind their way through the free battle pass to earn them one by one. Kiriko isn't unlocked until you reach Level 55, requiring a lot of grinding to add her to your team.
That said, now that she's available in ranked mode, once you've unlocked Kiriko, you'll be able to use any of her healing abilities on your team, taking advantage of the newest support player available in the game.