Review queues are unsupported on the Stack Exchange API, and it could be useful to write an app that would review. Should we add it to the API?
You would need to demonstrate that your reviewing app contained sufficiently advanced AI to be able to correctly perform the review.
Reviewing takes time and effort and involves checking many aspects of the post. This would be a major AI project.
The risk of robo-reviewing or just plain making wrong decisions is too great. Consequently, the risk of degrading the quality of the site(s) is too great.
I can see that a reviewing app could be built in stages, example first attempt: just look for NAA and skip everything else. Then build upon the app by adding other tasks. However, you would still need to demonstrate the effectiveness of the app before the powers that be would want to let it loose on the real community.