How customers can find products using AI image search in mobile app?

First of all, you must install the Magneto 2 AI Image Search extension on your website.

With the help of this module, you can enhance your website with an AI-powered searching technique for products where the customers simply upload the image and get the accurate or relevant products based on the availability of products in the store.

Now, if you want to achieve the functionality in the Magento 2 Mobile App. This will come under customization(A paid service).