The Burial is loosely based on the true story of Willie E. Gary, a personal injury lawyer, and Jeremiah Joseph O'Keefe, a funeral home owner, and the lawsuit against the Loewen funeral company. The 2023 Amazon legal drama film premiered at the Toronto International Film Festival on September 11 before being released on streaming on Amazon Prime Video and was met with overwhelming positive reviews. The project seemingly got Gary's stamp of approval since he made a cameo in the movie.
https://screenrant.com/the-burial-willie-e-gary-cameo-explained/