@Victoria Louise Altomare it might be worthwhile to search around on Ancestry.com
I am going to mention @Belgium, Luxembourg, and The Netherlands so that they are notified of your question. It would also be beneficial to reach out to them.
Additionally, you might try to reach out to https://www.familysearch.org/help/fhcenters/locations/saltlakecity-library to schedule a short meeting with them to at least get you on the right track. They are able to meet with you online for a 20 minute appointment.
In the FamilySearch Catalog, there's a listing of 1672-1805 Dhuy parish records, and on microfilm 315207 baptisms for 1713-1805 are listed. The 1779-1801 baptisms begin on image 340 (linked), and the 1798 baptisms are on images 408 through 410.
Have you tried the website of the State Archives of Belgium? https://search.arch.be/fr/themes/jalon/509-registres-paroissiaux-fr
(No parish records from Dhuy after 1796 there, though.)