Automatically add attachment to a planner task

I have created a PA flow to collate all the information from a MS Form. The form , in a nutshell, is an issues reporting form and as well as building a SP list the flow creates a task in planner.

There is an option on the form to attach a file to the issue, which I have sitting in the default folder on the SP site. I would, however, like to attach the same file to the newly created task in planner. I cannot seem to find an action available in flow which can help me to do this.