In my opinion, after looking at the high resolution image on your link, it’s clear your image has been subject to either to excessive editing (including AI) and enlargement or Interpolation.
As a general rule I recommend that you only shoot and submit work shot in Raw.
I also recommend doing your editing in Photoshop Camera Raw.
Learn the right steps of enlarging your images, wrong ways will “damage” the files.
AI sharpening or denoising should be used as the very last step.
As for critique of the actual photo, lets just say a cat lover will like it, and cat haters
will see just another cat among millions. So I reserve my best advice to plan ahead and add elements to your work:
Have fun taking pictures, remembering your business goal is to succeed in stock photography and making lots of sales.
Plan ahead and prepare for that goal. Do you think adding hands holding the cat, or a woman’s hugging the cat would increase your chances for selling increase, regardless of how many photos like that already exist? The answer is obvious, right?
Once again, enjoy the process!