I set the Wyze app Notification Sound setting to System Default. Uninstalled/reinstalled the app. At that point the screen is blank, ie, has no WyzeMessage listing.
After the first notification occurs, there is a single WyzeMessage listing. If left as is, the System Default tone will sound when a notification occurs.
If you enter the Advanced options of the WyzeMessage listing, you can change the tone to another of your choosing.
Either way, double-play is occurring.
Back in the Wyze app, if you change the Notification Sound setting to Sound 1, and a notification then occurs, you will have another WyzeMessage listing on the OS App Info page. If you repeat the same with Sound 2 and Sound 3, you will have four WyzeMessage listings total.
I found dicking around with those multiple listings to get ANY tone to sound SINGLY was futile. Though I gave up exasperated after a while thinking ‘just another thing,’ so maybe YMMV and a super persistence could win the day. 