One disappointment with the Fold3 is that the SPFE doesn't work on the cover screen.
To give myself the ability to scribble quick notes while out & about, a feature I found so useful on my Note 9 using the screen off Memo capability, I have added the rubber tip from a conventional stylus to the top of my SPFE & provided the necessary capacitive link from hand to screen by a narrow strip of adhesive Aluminium tape. This link takes you to a photo of it on Reddit