Duckstation is an PS1 emulator. I know it works wonderfully on Windows and during my the quick stint on Linux I didn't see a glaring Issue. There's also an android Version, but I didn't use it. The Rom alongside Instructions can be found on the wiki. Links: Rom https://play.google.com/store/apps/details?id=com.github.stenzek.duckstation Wiki https://dreamemulator.fandom.com/wiki/Download
step one : download retroarch link
step two : click load core (1st option)
step three : click downlaod core
step four: search for Sony - Playstation (PCSX ReARMed)
step five : download lsd dream emulator link
step six : open file explorer
step seven : move .bin file to InternalStorage/RetroArch/Playlists
step eight : open retroarch and click load content
step nine : search for InternalStorage/RetroArch/Playlists and click the .bin file
step ten : enjoy