Hello SparklingAnjewel,
How did you move the content over to the new iPhone 14 Pro Max exactly?
If the content you're looking to transfer is available to download, as a previous purchase. You can use the following to accomplish this: Redownload music - Apple Support
In case you transferred this through Quick Start, then it may take time to complete the transfer completely. This would depend on your network speed and the amount of data you'd have to transfer. We'd recommend staying connected to a known good working Wi-Fi network to complete this.
If you transferred the content over the computer, then you'd need to sync the iPhone to the computer using these steps: Sync your iPhone, iPad, or iPod using your computer - Apple Support
In case you're an Apple Music member, then you'd have to enable Sync Library. Here's how: Use Sync Library to access your music library across your devices - Apple Support
Let us know if that helps out or not, take care.