You might use the following techniques to find your Facebook URL:-
-Click on the hamburger dots in the application window.
-Locate the copy link profile option by scrolling down.
-Web browser
-Locate the company profile or profile page option on Facebook in your browser, then copy the link from the address bar.
To learn more, click the link.
​https://getassist.net/how-to-find-my-facebook-url/