I have a theory that this Pacifista Police is sentient and has kidnapped a Satellite to partner with the Big Mom Pirates.
I think there will be a twist and his personality will be the "Tyrant" identity that the World Government falsely painted Kuma with.
Ethanbaron V. Nusjuro neutralized all the Pacifistas MK.III which highlights the Pacifista Police's absent. Which is notable since he tried to kill Luffy and co. for theft which is less serious.
I think he is PX-1 and that Kuma sent him to a place where he found and ate a Zoan fruit that restored his mind.
I think PX-1 is a Cat Yokai Zoan due to the Nikyu Nikyu no Mi being associated with cats and yokais being so prominent.
Buccaneers have the ability to act even if their wills are removed so this how I think PX-1 was able to eat a Devil Fruit.
Also Zoans have their own free will which why I think PX-1 became sentient.
York revealed that Edison has stopped accessing Punk Records and he wasn't shown to have died. I think PX-1 kidnapped him and will use him to broker an alliance with the Big Mom Pirates.
It seems like Buccaneers are the third race Big Mom wants so I think PX-1 would receive a warm welcome from the Big Mom Pirates.
Also Big Mom is interested in the power of science. She wants to use it for gigantification and she does had a replica of the Punk Hazard lab on Whole Cake Island which Edison could use.