Hi there @yoshiofadown, welcome to the forum.
Not that I watch him, but I did once see a clip from one of FleeceKing’s videos where there was an abnormal density of Pokéstops in one location in Sydney, so as @Xenopus says, it’s likely that Niantic have been made aware of this area and other similar areas in Sydney, and they are performing a clean up, as the way the map was before should not have been possible with the proximity rules that Pokémon Go uses and was most likely achieved through Wayfarer abuse.
What happens is that they effectively wipe the affected areas in Pokémon Go and then allow them to sync again, thus ensuring the proximity rules get applied correctly to the area, so you should see the area repopulated within a few days at most.