Simplicity
User can change gender through simple form.
User can change first name through form.
User can change their username through form.
Public identity and privacy
Your old profile won't redirect to your new profile.
Instagram documentation on profile changes.
Keep in mind that if your account reaches a lot of people, your username change may need to be reviewed. If so, you'll be notified when we've completed a review. If not, your username will change immediately if available. Your followers may be notified of your username change.
Last update on June 25, 2022