In the test is there a way to access the clipboard when running in headless mode?
Be good to understand what you are trying to do with the clipboard, is this an image or text value? as if its just text you should be able to retrieve the text by the
Get Text keyword that browser library offers, then you can use the
Type Text or
Fill Text keyword if you was to use it somewhere else on the webpage, if its an image then this would probably be a different approach, but having more detail would be helpful for anyone to give you the best approach here.