Need to reset my Facebook password

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?

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

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