I have songs that are downloaded and personal songs that I would like to use that aren't available on itunes that I would like to use, but those songs do not show up on the local files? It's quite frustrating that I can't even use the songs I would like to for mixing when they are my on edits.
Have you synced this tracks to your device using iTunes? https://support.apple.com/en-gb/HT201253
Pacemaker can't view files which you have in the iOS files app today so they need to be synced using a PC / Mac to your device. If you can see them in Apple's default music app, that's usually a good sign that they should be seen within Pacemaker.
Another thing to check is that access to local music files has been enabled in iOS Settings -> Pacemaker -> Music Library.