This has nothing to do with phone security though. Pakistan is the source of spam calls in many developed nations. Those spam call center operators was able to operate on the cheap from Pakistan due to cheap labors and cheap access to international calls via VoIP, so by blocking unregistered VoIP and VPN, they hoped to kill the spam call center industries (or at least that's what they tell people when they started cracking on vpn a few years ago, might be legitimate if they're getting pressure from western goverments to control the spam situation). This will also increase tax revenue because legitimate call centers will have to use licensed VoIP services that pay tax to Pakistan government.

Don't get me wrong, I think those restrictions are horrible and Putin is a tyrant, but it's irresponsible to say that VPNs are illegal. They are not. People should use them to access alternative media like Meduza instead of accepting that there's only state media. VPNs are still incredibly useful and we shouldn't play into the scare tactics of the Russian government by insinuating that you can end up in jail by using VPNs. I think that's coming, too, but these tools are still available to get around lots of the censorship. As you yourself noted, most of the VPN providers aren't actually complying with the law, so you can access way more material, without current legal repercussions to the individual, at least based on the sources you provided.