Is it possible to attach a buggy board to this stroller?
In theory, you can attach a buggy board to almost any stroller frame, this included, yes.
However, the small size of the chassis, the wheels, and the overall size of this ultracompact stroller is not the best for attaching a buggy board. You might damage, make looser the chassis, shorten its usability period, making it rattly and wobbly, not even talking about the bad maneuverability and super small space for your steps. Read more about stroller buggy boards in this article here.