Save audio messages indefinitely
For some odd reason, Apple decided that you don’t want to keep audio messages forever. Even though this might be the case, we should at least have a say in what we want and don’t want to keep. It’s more than infuriating that audio messages disappear forever after just two minutes!
To remove this function, go to Settings, tap on Messages, and scroll down until you find Audio Messages. Tap Expire and Never. After that, your audio messages on Messenger will stay with you until the end of time. Or until you delete them manually, whichever comes first. Probably the latter.