The only way to transfer ownership Facebook Business Page is if the person requesting ownership likes the page first. After their “like is confirmed”, the person’s name will show up under this path “Facebook Business Page/Settings/Page Roles”. (See image below) At that point you select the person from the list and assign them as Admin, and save the changes. Since Facebook Business Page Admins have the power to remove their fellow Admins, the new Admin can remove you. Now they are the sole Admin aka Owner.