Hi @Maggan Wåhlin
Can you clarify for me so I can get the scenario right, please?
Are you asking if there's a way to generate a new Forms for Excel using Flow to trigger this new doc/form? If this is so then there's no way that I am aware of to currently do this.
Or are you asking to retrieve the details of the form once someone uses Forms for Excel to create it? If yes, then you can certainly do that which I'm happy to describe if you need it.