How to set custom text notification sounds with a Samsung Galaxy S22?

I just purchased a Samsung Galaxy S22. It runs Android 12 and One UI 4.1. What I am trying to do is use a custom notification sound for my text messages (Google Messages). I want a custom sound for one specific person and another for everyone else. I had this previously on my Galaxy S8. Unfortunately this does not work for me. I have added the sounds I wish to use to my phone's storage. This includes custom ringtones. Those do work as I am able to select them when choosing a ringtone. I can see them in my list of available ringtones. But the sounds I have added for notifications do not appear in the list of available notification sounds. I have tried placing them in the following locations: - /root/sdcard/Notifications - /root/sdcard/Ringtones - /root/sdcard/Android/media - /root/sdcard/Android/media/Notifications It's this still possible to do? If so, what am I missing?