Yes proteins can be dynamic, and multiple proteins can come together to form bigger structures (like a cell's membrane for example), and they can very much interact with other proteins and molecules in complex ways.

I think AlphaFold gives us more of a static picture that doesn't tell us much about how the protein will interact with the world. Predicting these dynamic aspects, protein-to-protein interactions, and ultimately an entire cell, is probably what they'll like to do next.

I don't know if the walking buddy is a single protein, it may be a handful of different ones joined together.