Go to your profile and click on the three lines button in the top right corner >> settings >> >> Request verification
Fill out the form and upload your ID card. Your voter’s card, National ID card International passport, driver’s licence or any government issued ID card with your photo will work fine. Please note that It must show your name and date of birth.
After filling out the form, submit it and wait for Instagram to review your request, and look for a notification in your notifications tab. Instagram will deliver a notification verdict — confirm or deny — via a notification. Just because you requested for verification doesn’t mean you will get verified.
Note: if this doesn’t appear for you yet, be patient! Instagram is rolling it out worldwide, so it might take a bit for you to get the feature. You can also try updating your app.