I have Zero doubts that if it was possible for F-Secure to work in the mentioned countries, they wouldn't hesitate for a second.
You are wrong. how other VPNs works? Windscribe, hotspot shield, And many others work here.
Pia also works in China and it's not like that every VPN don't work in China(I know that many works).
Government block the VPN servers but not all of them(they just can't cuz it damage other services )
I could connect to F-Secure servers from Iran(i tired this VPN once) but cant dw the VPN from the f-secure website.
this is exactly about f-secure itself.
F-Secure has a lot of resellers in my country and if they refuse to work with government law then the government close their business(so they lost the market and it cost money ) : )
I know that it works : ) and i can show you if you want.