You may not see your Page's name because:

• Your Page is listed under a different manager category – personal or business. Click the < arrow to search a full list of your Pages.
• Your Page role doesn't have permission to create ads. Ask an admin of your Page to give you permission.
• Your Page is unpublished. Publish your Page.
• Your Page was unpublished for policy breaches. Learn more about our Page Policies and how to appeal.

If you're using Business Manager, there are some additional reasons why you may not see your Page when you create your ad.

• In Business Manager, when you create an ad, you will only see the Pages that you've claimed or requested access to. If you're trying to advertise for a Page outside of Business Manager from an ad account in Business Manager, the Page won't be available when you create an ad.
• To advertise for Pages that you manage in Business Manager, you need two different roles:

  • You must have a role on the Page that lets you advertise for it (Page advertiser, moderator, editor or admin).
  • In addition, you must also have a role on the ad account that lets you run ads (ad account advertiser or admin).

* Nguồn: Facebook