@Sunshine Thank you for answering so quickly, i've already tried doing the steps you provided, but still i havent found a solution for the problem, QoS is disabled and enabling it only lets me change...

(Disclaimer, the router that i currently own does not appear on the model list, that's why it says Archer AX1500, but in reality the router i'm having trouble with is the XC220-G3V or Sometimes...