You configure your wireguard stuff on your host and this is just a web ui that can show current peers and generate new ones.
That is useful for more complex configs. I only connect to specific servers and address spaces with the VPN, I also Support ipv6.
For that kind of configuration, I found it necessary to host a DNS server for the network, so that I can access the reverse proxy of my Homeserver.
If you’re only looking to warp your device into a different network, that’s more straight forward. I suggest to take a look at wg-easy if you want a web ui for that scenario.
Also, Caution: Some wireguard containers that use your hosts config love to delete them, so make backups. I’m looking at you, wireguard-ui.