How do I send my original music files on my Iphone 12 to other peoples phones or devices?

While you can share a song from the Music app on your phone, that just sends a link, it doesn't send the actual file. And, if the music is of your own creation, I don't think that's going to work.

If you have a Mac and ff you put the file in iCloud Drive, you should be able to share it to other people who have Apple devices using AirDrop. This would, I beleive, require that you go back to your computer and set things up.

Access and manage your files in iCloud Drive - Apple Support

How to use AirDrop on your iPhone or iPad - Apple Support

Hi, Walter! It’s not possible to do this on Music, since the file only exists locally on your iPhone, not on the actual streaming platform itself. Therefore, to share a music file (e.g. MP3, WAV etc), you will need to send the original file from wherever it’s stored.

I hope this helps!

Sorry to hear that, but you’ll have to locate the original file in order to share it.

You can send your feedback directly to Apple here: Feedback - Apple Music - Apple