ASY has total control over majority of these rallies and was just simply tiring out AY into making these mistakes.
That is her game. She wins points from opponent's mistakes ( mostly). She has excellent clearing game which is not pleasant to many top players. They try to force themselves to break this game which eventually leads to errors.
Ok... I've no idea that is a strategy ... Not my cup of tea but it seems to work against AY... Wait, is this Momota's strategy as well?
Yes it is Momota's strategy as well but it looks much better when he does it. 2019 Momota after squeezing the juice out of his opponents could still up his pace in the second or third game. This makes a waaaaaay more entertaining match. And to do that Momota had to deal with powerfull attacks such as Ginting's. So it doesn't feel the same at all. The pace is also much higher and rhythmic. ASY however isn't feeling any pressure from AY. The game is very slow.