The old visualisation contained a Choice class which you could use to select one of multiple discrete/categorial options.

https://github.com/projectmesa/mesa/blob/53ce2945a1dfaca526e3b64965672940bec6f7a9/examples/advanced/pd_grid/pd_grid/server.py#L12-L16

It would be nice to have that in the new SolaraViz module. Maybe an boolean Checkbox would also be useful. For full context, NetLogo has these options you can place:

@Corvince would you take a shot at this?