Versus a river shove on A73-5-K, AQ is strong enough to continue, but we should have taken a more passive line earlier to avoid getting jammed on by a very strong range.
On A73r, BB has more Ax and stronger overall range than we do, so theory leans heavily toward checking our entire range, including top pair. If we do bet, a small 33% stab is preferred; the 3.5BB c-bet is fine but slightly larger than ideal.
The 5s on the turn is a brick for both ranges; our top pair still has strong equity. Solver prefers a mix of checking and small bets here, but a larger turn bet around 60–70% pot is acceptable as a value/protection bet versus 7x, 3x, and some draws.
River Kd is a big card that connects well with BB’s range, and after we bet flop and turn, their range is now very strong. When BB now shoves, we’re getting about 1:1 and need roughly 50% equity. AQ is ahead of a lot of Kx and some bluffs, so calling off is justified.