A PWA uses the latest technologies available in browsers to offer a mobile experience as similar to that of a native application.
You cannot deactivate a technology that comes in your mobile browser, you decide whether to use it or not to use it any more in your mobile. Forumotion only makes it possible for our browsers to open our forums, with this technology that is incorporated into the browser.
If you want to eliminate the possibility of notifications in your forum, removing the toolbar would no longer have notifications, even if you say you don't want those notifications for the first time.
It is not a Forumotion application that can be removed, it is incorporated in chrome firefox, etc ... We decide whether or not to do it.