Quoting the official Citra website, Download section:
"... Citra currently does not support Android or iOS, only desktop x64 systems."
https://citra-emu.org/download/
someone is developing it on their own (I think)
also there is an apk in the video description and it work grat
guessing it's just a GPL violating fork of Citra.
If anybody can verify that I'll lock this thread.
Is the source code published anywhere?
I honestly did not fully search. I tried looking at the forks list on GitHub, but I don´t really have time to check the existing 900+ forks Citra has.