Kai Tak Airport

I mean, this is from like last century and probably not where this post's photo is taken, but low flying planes exist. Not saying this isn't generated though.

There's definitely something going on. It also looks mirrored top/bottom

People have been doing this Photoshop since before Photoshop existed probably. Adding a plane is a true crowd favourite. This one is egregious though.

doesn't have to be generated, might be just shopped, also almost perfectly mirrored buildings look sus

I believe it could be Hong Kong

Probably. But I've also seen planes flying awfully low over downtown San Jose.