Yeah, it just feels a little different, but I think there are lots of gray areas here. I mean, if I had a 600 + TC on the camera it would have worked out about the same without the upsizing.
Should AI based enlargement be disallowed?? While doing things like generating different backgrounds with AI seems really wrong, this seems more like "I didn't have a bigger lens, or a full frame camera so I did this
" The AI here is not changing the image ... conceptually it is merely giving the same image more pixels, which allows more cropping.