Unable to import mp3 files to garageband on iOS 18 on iphone 15 - Greyed out

I need to use an MP3 file as my ring tone; I am trying to import the MP3file to garage band ( v2.3.17) using my iOS 18.0 / iPhone 15.. When I open garageband, I can navigate to the music folder (on my phone) and see the files. However they are greyed out and not available for selection.

I did somehome manage to get the mp3 to work on my apple music in my playlist.

These are not protected mp3 files.

Please assist as my ultimate goal is to use this clip as my ring tone. I am looking at Garageband as apple forums mentioned that GarageBand is the only way to do this.