Emusak-ui - tool to manage your switch emulators, such as downloading saves or mods

Project information: This is a tool which allows you to download saves or mods for Nintendo Switch emulators using a compatible Emusak backend

Name: EmuSAK UI
Homepage: https://github.com/CapitaineJSparrow/emusak-ui
License: GPL-3.0
Upstream has been contacted: no yet

I’ve found Ryujinx emulator for Android at this link: Ryujinx Nintendo Switch emulator for Android - Download APK
But I can’t find it on the official website