Before we start, download Instagram Authenticator App by searching for it in your Apple device's App Store. And make sure to set up Authenticator App by 2Stable as your main Two-Factor Authentication(2FA) option. Here is how to set up it.

Open your Instagram app on your mobile device. Tap on your profile picture in the bottom right to go to your profile, then tap (3 bars icon) in the top right.

Look for the gear symbol and go in Settings

Move through the next screens by tapping Security > Two-factor authentication > Get Started.

You'll need to choose your security method. Select Authentication app(recommended). Then choose Next

Authenticator App will automatically choose the Instagram logo and autofill account name and secret key. Confirm it's correct by clicking Save.
Tip: You can choose the account icon by pressing on icon

Copy the numerical token provided for Instagram. Note that this code refreshes every 30 seconds.

Return to the Instagram app and type the numerical token in the appropriate field. When done tap Next.

Your Instagram account is now protected. Press on Next, you are presented with access to your backup codes. Each code can only be used once. We suggest you to store them digitally in a safe place. Press Done and that's all.