You can also see a list of different formats in the general VPN settings. This happens if you have multiple types of VPNs or applications on your iPhone. Basically, you can select the VPN you want, and from there just click on the slider to turn it off and enable it.
1.Open iPhone settings and look for "VPN".
2.Find your VPN connection and look for the switch next to it. To turn off the VPN on your iPhone, just turn the switch to the "off" position.
It works in 2021 after new updates as well.