If you're unable to find a solution for iOS sound notification since 2017, just add 5-10 different sound options for users to select in the app, as it can override iOS settings.
Current sound is same as Uber, I don't want to ignore my notification thinking it's uber marketing
and/or pick my phone thinking it's my team when it's actually Uber.
Really team, just pick 10 sounds from the internet & put it in the app.