Download the Foxray app from the App Store:
https://apps.apple.com/us/app/foxray/id6448898396
Add a new xVPN subscription.
Enter any name, copy the link to xVPN subscription from the section Subscriptions.
Connect to VPN.
In case of problems with connection, changing the VPN login or password, you need to update the list of xVPN subscriptions. Swipe left.
Click the Refresh button. The list of xVPN connections will be updated.