I know very little about networking unfortunately…I do not even think my ISP offers IPV6, but I could just be completely wrong. I went to both of those sites, and it showed me as across the world, where I had selected with ProtonVPN. There were no settings in there at all to change anything. ProtonVPN on Linux is literally just a box with a list of countries that you click on. So much weaker than Mullvad and ProtonVPN on Windows.