What's particularly good about that set is the consistency between images. It's viable that you're looking at different images of the same thing, whereas usually with AI slop, if you have multiple images they have fundamental differences in the details (different collars, etc.)
The main giveaway I can see in those is what's printed inside the collar changes between the first, third and fourth images.
The texture of the shirt is also improbably different, especially around the close-up of the crest.
Beyond that, there's the weird glow AI images seem to have. The lighting is never quite right.
But give it another couple of years, and it's going to get so hard to tell, even with a decent inspection.