How to set a link that will open the facebook application from the phone?

Question

Facebook

Good afternoon.
I created a link on the site in the form of an icon, clicking on which should open the facebook application from the phone.
At first, I simply registered a link to the facebook page, and it opened in the browser.
Then I changed it to a link that opens the messenger app.
But, the customer is not satisfied with this, he wants the link to open in the facebook application on the phone.
What should this link look like?
Thanks in advance.

Answer 1

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