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.
1. They are in most cases run by national spy agencies.
2. They will at least appear to work, i.e., they will provide you with access to websites that are blocked by the country you are in. Depending on which country's spies run the system, they may actually work in the sense of hiding your traffic from that country's spies, or they may mark you as a specific target and save all your traffic for later analysis.
My inclination is to prefer free (open-source) software that isn't controlled by a company which can use that control against its users.
Probably if you investigate the question you will come to the same conclusion I did; I don't have any special access to non-public evidence. Maybe you won't, which is fine with me. I don't have anything to sell you, so your opinion doesn't really affect me.