The Lariska canon contest hasn’t started yet, and it’s not guaranteed to happen, but Lariska is on the slated character list after the Hagah and Tuyet contests are completed. For more information, check out this topic: BIONICLE G1 Canon Contests Discussion & Questions
As for your Lariska MOC, I think it looks pretty good. You used teal really well, and the mechanical arm is great. The breasts are awkwardly far apart, but they definitely achieve the goal of making her recognizably female. I recommend placing them a bit closer together and maybe angling them down a bit, if that’s possible. The cape looks cool but definitely feels out of place for Lariska, in my opinion. It’s a solid build overall, though.