The differences between the Hunger Games in The Ballad of Songbirds and Snakes and the one in the first Hunger Games movie are stark, given that they are 64 years apart. However, Coriolanus Snow was responsible for many of the changes that took place in the years between the two stories, and one of his most horrific developments for the Games is an indication that his other plans were failures. Unfortunately, the solution in question seemingly worked, leading to 65 more years of children slaughtering one another for the entertainment of others following the failure of the 10th Hunger Games.

https://screenrant.com/hunger-games-president-snow-update-changes-not-work/