Using ringtones from phone

I used to use one of the default ringtones from my phone as my alarm (Morning Glory Samsung 8). I briefly changed it to a song that I had downloaded and now cant set it back. The “ringtones” section in the alarm settings is empty. Underneath the ringtones section in the “your music” section it has pretty much every sound my phone can make (e.g. low battery, call disconnect etc.) but none of the default ringtones that I can set as ringtones in my phones settings. How can I get rid of all the weird sounds that I don’t want and get back in the ringtones that I may actually use?