You've come to a wrong place to ask. Most people here (judging by recommendations of own VPN instances, Tor, Tailscale/other Wireguard-based VPNs, and Mullvad) don't have any experience with censorship circumvention.
Just look for any VPNs that are advertised specifically for China, Russia, or Iran. These are the cutting edge tech, they may not be so privacy-friendly as Mullvad, but they will certainly work.
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