Many people forget their passwords after logging into their accounts but never log out. Occasionally, they need the password to log in to their accounts. For example, if you changed your phone or logged out by mistake. Basically, here is how it works:
1. Go to facebook.com and click on the "Forgot Password" option.
2. Choose your email id and enter the email.
3. In the next step, answer the security question correctly.
4. Now you'll receive a code for account verification in your mail.
5. Enter the code and the password reset page will be opened next.
6. Create a new password and use it to access your Facebook account.
Read more: https://lordgeek.com/recover-forgotten-facebook-password/