[deleted] As of now, I registered on OneSignal with the correct site URL, Everything is HTTPS so I didn't select the 'Some pages do not have HTTPS' and hence I have no OneSignal sub-domain. I finished setting up everything on the site.
I installed the extension, added the appID, API Key and the User Key, left the Subdomain Blank, Set the length of excerpt to 50, checked 'Show permission prompt immediately to authorize users' and finally clicked save changes.
So far there has not been any prompt on my site asking me to allow notifications 🙁
Is there any step I'm missing?