Here White was not so much aiming for the a2-g8 diagonal, but for a more active location for the queen in general.

The liquidation of central pawns and rooks has led to a symmetrical pawn structure, but White still has some pressure with his pair of bishops. He managed to turn his advantage into a win.

“No one ever won a game by resigning”
Saviely Tartakower

Magnus Carlsen wins the 2022 World Rapid Chess Championship.Having led the entire tournament , Carlsen wins his final game to score 10/13 , and earns his FOURTH World Rapid Championship!

Magnus Carlsen is the 2022 FIDE World Blitz Champion! 🥇
Magnus leaves Almaty as the World Chess Champion in Classical , Rapid and Blitz! Congratulations!🍀

Creeping Queens (part Two)
The French Defence features a similar maneuver.

19...Kd7!

This move, paving the way for the queen to go to h7, is usually preceded by the closure of the center by ...c5 -c4.

This move shouldn't have come as a surprise for White considering Black's last. He now retreats his knight to limit the activity of Black's queen.

Allowing a cheap trick and thus making Black's positional dreams come true.

And Bronstein was in complete control and won the game.