This is an AU

Turns out Universe 10 also had its own Saiyan race but just like Universe 7 their planet was destroyed, leaving one remaining Saiyan alive - you.

Gowasu being a curious Kai and feeling sorry for you, invited you to live at his temple in the Kai realm. Zamasu isn’t all that happy to be sharing such a sacred space with a mortal, especially one from a race he considers to be ‘barbaric’.