@UgoM 

Maybe this article can help you, only the web interface has some differences.

https://www.tp-link.com/us/configuration-guides/configuration_guide_for_facebook_portal_on_omada_controller_2_6_x_or_above/?configurationId=22135

And you need a controller to set it, this is for you:

https://www.tp-link.com/support/faq/1041/

To set up and enable Facebook Wi-Fi on your wireless access point:

1. On a computer or mobile device that is connected to your wireless access point, open a web browser.
2. Enter your wireless access point's IP address in the address bar of your browser. 
3. Sign in with your user name and password. 
4. Select Management.

Regards,

Willjoe

With Facebook Wi-Fi, visitors of your business have the option to check in to your business with you Facebook page . Your visitors' check-ins can be seen by their friends and family, helping you connect with more people.You can also use WiFi system Facebook access with this method given below.

Go to Settings > Profiles and select Guest Hotspot. Under Authentication Type, select Facebook Wi-Fi. Go to Settings > Wi-Fi and select the Wi-Fi you'd like to enable Facebook Wi-Fi for.

Go to Settings > Profiles and select Guest Hotspot. Under Authentication Type, select Facebook Wi-Fi. Go to Settings > Wi-Fi and select the Wi-Fi you'd like to enable Facebook Wi-Fi for.

It won't give you full access to Facebook without internet, but you will still be able to browse your stream and even post comments and status updates while offline. The Facebook offline news feed works by caching your stream when you are connected.