This is a custom script style by the Johns-Carabelli company of Ohio. The company has designed several lettering styles for internal use, which were originally hand-drawn on each memorial–however, it is likely they have since created digital versions.
Because there is no digital font available, it will need to be matched manually. If you need it, the Monument Lettering Center has a service for matching custom or hard to find lettering, and has a large collection of sample images of this lettering style to draw from: https://www.monumentletteringcenter.com/product/cemetery-inscription-matching-service/