Using the same Persona Template with multiple Personas, you cannot hide fields in one Persona but keep those fields in other Personas. This, of course, would be using the same Product.
So, in the same Product, have the option to keep/hide fields between different Personas.
Thank you for the idea. We currently do not have plans to update this area as it does not align with our current strategy or recent customer requests. If the need for this idea grows, we will review again at that time.