Good afternoon Jarias1022,
Welcome to the Apple Support Communities!
It sounds like you are trying to use songs for alarms on your iPhone 12 Pro Max, and we'd like to help.
Are these tones that you have purchased from the iTunes Store, or complete songs you've downloaded from the Apple Music service?
The resources below will provide some guidance:
Get ringtones, text tones, and alert tones in the iTunes Store on iPhone - iPhone User Guide
"In the iTunes Store app you can purchase ringtones, text tones, and other alert tones for clock alarms and more."
Create a ringtone of your Logic Pro or GarageBand for Mac song
If the issue persists, please reply to this thread and we'll do our best to help you!
Take care.