I don't use TeslaUnread but I've just installed it to test myself. I use Nova Launcher, so it will be easy to check.
What I've done:
1- Install TeslaUnread from Playstore
2- Customize the apps concerned in TeslaUnread app (so, XDA Labs and XDA Forum ticked)
3- Battery Optomization disabled in Android settings for TeslaUnread
4- Make sure TeslaUnread counter setting is enabled in XDA Labs general settings.
I will report soon.