How do I save a audio message from my messenger app to my iphone

Hey there, and welcome to Apple Support Communities, kananialika!

From our understanding, you want to save audio messages that are sent in the Messages app. We can certainly understand your concern and can help provide some insight.

To save the audio message,  you will want to tap on “Keep” before it auto deletes. You can learn more about that here: Send and receive photos, videos, and audio messages on iPhone - Apple Support

Kindest regards!