It's just two characters with the same name.

There’s also two Cameron Kleins

Marvel Database treats them as the same character:

https://marvel.fandom.com/wiki/Tina_Minoru_(Earth-199999)

But I think Tina (Runaways) was too busy being a mother, member of an organization tied to a cult and alien, and CEO of a large company in Los Angeles to be Master of the Hong Kong Sanctum at the same time..