Seen this question asked a few times, and the only solutions are from UI6, where it appears to have changed a little.
As always, I'm sure many know this tip by now, but I'm making a post to help those who don't.
To enable different notification sounds for an app:
Very first step: *Do this first, or "notification categories" won't show up in the second step.*
- Settings > notification > advanced settings > scroll down and turn on the option, "Manage notification categories for apps."
- Then:
After toggling that on, go to Settings > notifications > app notifications, choose the app, then "Notification Categories." At the top, there are "Account activity and policies." Click on them (not the slider, the name of the categories- not the slider), and then it should let you click sounds.
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