TLS all looks the same... if an IP appears to not be online from you, but you can check from a third party it is online, then you can prove the ISP is filtering your traffic, and then they have a game of whack-a-mole when you move to using a VPN
unfortunately, yes, ISPs have a lot of power, and mostly they play fair to keep customers but ultimately if the government orders them to do shit, even in secret, you have to defend yourself
it's shitty, but that's the world we live in currently... a total farce of pretense of civility, with vicious, satanic evil behind the curtain