What if the patent can't be found?

It may still be in the review stage. Only when the patent is made public can we find it online. Invention patents are open at the examination stage, and utility model patents and

design patent

It will not be made public until it is authorized. I don't know what your situation is. Of course, if it's a patent office,

System update

If it is not timely, there is nothing we can do.