Yes, that is happening for many years. China being the most known state, but AFAIK even well-recognized first-world democratic countries like UK block some websites.
> then the architecture of the internet needs to take more evolutionary steps.
Adoption of IPv6 is a good example that architecture of the Internet is pretty much set in stone at this moment. We can put more layers on top of it, like Tor network, but underlying protocols are still IPv4/IPv6 with enough meta-information to allow efficient blocking of protocols or resources.
I have some hopes that new TLS standards with hostname encryption (ECH) along with CDN networks will make blocking impossible. But even that is easily circumvented with government MITM. Kazakhstan already deployed all the necessary hardware and did some successful tests on scale. Browsers blocked its root certificate, but will they block (imaginary) China root certificate, losing 1.5B users?
If that is happening, then the architecture of the internet needs to take more evolutionary steps.
If the state can censor the internet, there's nothing 'inter' about it. It's just a network, subject to the whims of its flailing predecessor.