Firstly I think you're missing a ton of value by checking the flop. You have to bet to get 3 streets vs Ax.

River is a clear shove, especially after underrepping your hand so much. He can have a lot of worse hands and even if he only calls with full houses you have >50% equity vs a calling range.

You should not worry about QQ or AQ if he had QQ he would of raised pre, he could of called with AQ on the button however . On the flop you should c-bet for sure but when you check they also check behind, a hand like AQ would not check that back well at least not IMO. so if i were playing this hand i would not have either of those hands in his range on the turn. he calls your bet but they could be doing this wide because of the action on the flop his range IMO is alot of A-X and suited connectors. to replay the hand you bet from CO so your opening range is wider than an earlier position you check the flop then bet a queen, its possible your opponent has a weak ace they now thinks in good they could have KJ for the straight or some similar hand. when the river is an ace you should shove because his actions so far are likely because you appear weak so if you shove he will likely think you are bluffing.

QQ was dead and buried

you should prey he has QQ lol

Can you please tell us what he had? I'm curious as fuck.

of course that is AQo