AI? Looks rather like low tier CGI instead. Most "crowds" are CGI, have been for many years. They're just usually made in a higher quality to hide it better.
There's been so, so much amazing design for this film series over the decades. Especially with regard to the sound design (known as foley). Iirc the 'pew pew' laser noises were made by tapping a taut pylon line with a hammer, and the lightsaber noises were discovered by accident when a microphone was swung near a TV set (though I could be misremembering some details there, been a while since I read the book about it).
This technology will get better, to the point I imagine most of us won't be able to see the difference. Scary stuff all around.
Though this shot is rather telling because that background character is "Center right" which basically gives it a spotlight. At that point, it is no longer a background, it is the scene.
Though, it is a high-school teen sports Disney movie, so I am not expecting much in the form of creativity or effort.