It may take two to three days for your article to get approved.
To find whether it is approved or not,
1. Go to "My Earnings" section on the left side.
2. In the profile, you would find "My Articles" tab.
There you can find all your articles with the present state, whether pending/Approved/rejected.
If you have any more doubts, go to the FAQs section.
All The Best.