Since this is a custom fork, it is not available on the Google Play Store. It is primarily distributed through the Retroid setup app . If you need to reinstall it, community repositories on are the most reliable sources. for specific GameCube or Wii games?
You might ask, "Why not just download the latest version?" In the emulation world, newer does not always mean better for specific hardware . Version 1.2.1 hit a "sweet spot" for handheld devices released between 2020 and 2024.