This would be a nice feature. I’d request, though, that to whomever is going to work on notifications please don’t bundle legitimate message alerts with “hey, use the app” notifications because it is the douchiest thing ever to do (looking at you Snapchat).
I wondered that as well but assumed it was because this app is still in Alpha status. I’m surprised they haven’t added it in yet.
Also it’s weird that your notifications in-app don’t switch to “read” status unless you reply. Sometimes I have nothing to say to someone who replied to me and the notifications are piling up lol