This is a sensitive topic which I will explain gradually for you. You might be typing to post a status or you want to make a comment on Facebook then you might have come across clipboard. This occurs when you want to copy an article, maybe from a Facebook page post to paste and publish on your status then you get the pop-up, copied to clipboard.
To answer the question where is Facebook clipboard? we need to know the meaning of clipboard. A clipboard is where things go on your device and computer when you Copy something to Paste later. The notification icon appears when you highlight an article or text you want to copy on your phone. This has nothing to do with Facebook but your device. In summary, there’s nothing like a Facebook clipboard. If you want to know about your phone clipboard checkout Wikihow.