Need to reset my Facebook password

Facebook is not an Apple product. Contact the app developer here --> App Support or Facebook Help Center | Facebook

Tap in the top right of Facebook. Scroll down and tap Settings, then tap Security and Login. Tap Change password. Type your current and new password and re-type new password, then tap Save changes.

How do I change or reset my Facebook password?

Look here -

https://www.facebook.com/help/1573156092981768/?helpref=popular_topics

See -> https://www.facebook.com/help/213395615347144?cms_id=213395615347144&maybe_redirect_pol=true