Can the Iranian government cut the internet access, completely, from its people?

The Iranian government is scared shitless of the internet. Every mudslime despot is. In 2009 people revolted with the aid of Twitter. They blocked it. The following year it was WeChat. They blocked it. In 2018 it was Telegram. They blocked it... But this time, they failed. See, technology is not kind to mudslimes. Telegram is open-source, and some Telegram clients have built-in proxy. Plus, most people, like me, have VPN, sometimes, with static IPs.

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My question is, if they fail to cut off people's access from the more problematic parts of the internet, can they block it, completely, after 20 years of infrastructure built around it and everything done with the internet, and more than 70% of people using the internet daily?

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Thanks for your answer, and please, if they block it, will the US government do something? Like, free satellite internet?