Hi, yes, you’ll need to store them in some way, such as in a separate file to import later, or as a buffer, like an array of bytes. You can use save game files in UE to save and load this data.
For instructions on exporting audio data into a file or buffer, refer to this docs page: Export audio | Georgy Dev Docs
For instructions on using save game files (which is cross-platform and already integrated within UE), follow this page: Saving and Loading Your Game in Unreal Engine | Unreal Engine 5.5 Documentation | Epic Developer Community