It very much is. Networks don’t work on geographical borders. ISP censorship on a state level would be a nightmare to implement for a specific state without impacting users in a different state. On top of it the government would have to maintain a specific list of IPs they want banned given how easy it is to spin up a new website on a different IP. It’s not impossible, but it would be a nightmare to implement.
Geo based IP doesn’t always apply and it’s more in line for a region than say something like a state. Sure there’s some overlap, but you’re going to also have a lot of misses.