Hey @YKK360 These extensions are available in the extensions catalogue.
You can install it from there. Here’s the link to the Adobe
documentation about extensions
https://experienceleague.adobe.com/docs/experience-platform/destinations/catalog/advertising/facebook-pixel.html
1. The third party IDs i.e Facebook Pixel, Twitter, LinkedIn etc can be
found in your respective accounts associated with them.For example: Your
Facebook pixel ID is in the Ads Manager. Make your way to the navigation
menu, ...