No notification sound on Companion app (Android)

Not sure what’s going on here but I’ve bought a new phone (Redmi 9, Android 10) and when I install the Companion app there’s seemingly no notification sound effect bundled with it.

Other apps I’ve installed are working as normal - eg Facebook Messenger has the standard ding sound - but Companion just uses the default phone notification sound and I can’t find the standard Zwift Ride On sound to set it manually.

Tried reinstalling several times, but it’s as though the sound isn’t assigned properly within the app or however it works.

From what I can gather, this may be because Companion isn’t fully compliant with the way ‘App provided sounds’ work on later versions of Android.

A clean install of the app should restore the Zwift sounds:

But it doesn’t.