Kindly re-connect your Facebook account once, as we can see your Lead Ad form is not visible on the triggers dropdown.
Please try again and make sure that you are connecting the Facebook account in which you have Facebook lead Ad.
Also, confirm if you have provided proper access to the lead form for FB pages -
Access your account's settings to confirm the connected account has the correct 'Manage Page' permissions and then re-connect your account. You directly check whether you provided all permission to Pabbly Connect for all Facebook pages from here -
Log into Facebook to start sharing and connecting with your friends, family, and people you know.
www.facebook.com