How to like a Facebook Page as a Page
You can like Facebook pages as a private profile, or as a page. If you have a page role or are an admin on a Facebook page, you can like another page with your own business page. Ok, let's just show you how it's done without further ado.
Liking another business page as a page
Open Facebook and in the search field type in the name of the Facebook page you want to like.
Open the Facebook page you want to like.
Click the three dots below the cover image, as shown in the images on the right.