Why AKo with Kh should 100% bet a full pot? Thanks~

Hi Sirs,

9Max cash game, 100BB eff. stack, UTG open, fold to BB, BB call.

Flop Qs / 7h / 4s

BB check, UTG c-bet 33%, BB call.

Turn 7s

BB check, UTG bet 130% pot, BB call

River As

BB check, why does GTO wizard choose AKo with Kh to 100% bet a full pot?? thanks~