AI generated if I had to guess. Other works by this creator seem so as well.

So, just for the record, is there any base on this AI claim besides guesses and gut feeling?
While the aliasing is a bit odd, it's possible that it's a stylistic choice because the full version mimics a phone camera.

Response from the artist:
https://x.com/R_cutiee/status/1869606529198178360

and now they will no longer continue. good work bozo