I'd assume the regular readership of Detroit Catholic skews fairly heavily Catholic, and "Catholic expert" is an important (to them) signal as to how seriously they should take the expert's words.
Vs. from a bit of searching - nope. The Vatican has explicitly said that none of the various public "Catholic AI"s have any sort of ecclesiastical or papal approval. And at least officially, the Vatican's internal AI tools are only for archival work, translation, and other admin tasks.