On Notificaiton Settings I'm able to enable the Push Notifications (bottom of the page) and then I get the browser notification.
But it should be also proposed in notification dropdown header (and probably browser should also ask to enable these), forcing users to go to some page, scroll down to the bottom and click some link is a terrible UX
My theme has only colors adjusted, I've also tested on default theme and there is no difference.
Web App is working fine, I had checked this before - had some issues (start url etc), but fixed these.
Still no push notification suggestions 😞