Not a total techie, but on my Android Samsung Flip-4 phone, I go to:
Settings → Notifications → App Notifications → and then choose from the list which ones to turn ON.
So I get a notification in my aids and external sound for the doorbell ringing, phone call, text coming in, things like that. See if your phone is the same.
You should be able to scroll down that list and turn things ON or OFF to your preference.