The inconsistent backround,

the cutoff text in the second panel,

that every panel is slightly different but featuring the same content(for example the "He" on helium is very slightly different in every panel, a regular artist would copy paste the text, not draw it every frame),

the font not being consistent(Look at the "E" in "HELIUM WALKS" and then the "E" in "WE DON'T"),

the absence of period symbols(Image Generation LLMs love to do this)

and the artstyle is very specific to other AI comics that are currently floating around the net.

Inconsistent bsckground shelving

On top of everything others have said, there's no watermark, signature, url, etc from an original artist. Webcomics like this will always have one unless it's removed by a reposter, which yeah, that happens, but I feel not as often these days. And when it does, it's a pretty shitty thing to do, and not a good situation either.

the font, all ChatGPT produced "memes" use the same "font"

Another thing not mentioned is how when you zoom in on solid colors you see compression artefacts. Generative AI hates solid colors and sharp lines, so they often have slight imperfections