Anbernic RG351P & 351M standard titles list and how to add new games

How many games are on the Anbernic RG351P? Titles can differ between suppliers and over time as Anbernic reserves the right to adjust the cards and titles shipped with the 351P and 351M models, the initial  standard release came with around 2,500 titles running EmuELEC. Two systems proven to get more performance out of