after i reset all setting, i cannot get notification badge for instagram, edmodo, and gmail, i’d tried to open setting and look for notification, and i cannot find the apps in the notification setting, can someone help me? please

If you're not receiving notifications from these apps, try allowing notifications and enabling Badge App Icon. Go to Settings > Notifications > Find the app > Turn on Allow Notifications > Turn on Badge App Icon. If this doesn't work, try reinstalling the app and open it. The app will firstly prompt you to give access to Notifications, select Allow and you will receive notifications from that app.