I can’t speak about the capabilities of the Ping remote, but in searching I see that there is some amount of work attempting to reverse-engineer the Ping radio communication at https://github.com/mariusae/pingrf
Similarly there is work on the Omnipod radio interface at https://github.com/openaps/openomni
So perhaps one day those command links will be well enough understood that they can be incorporated in closed-loop software. At present, the Medtronic command interface is well understood, so it is the one kind of pump currently used.
One overview of the situation is https://openaps.readthedocs.io/en/latest/docs/Gear%20Up/pump.html