Source: https://gist.github.com/stonebyte/4d2beac1460449b4cf9dd6e921865a45

Commands:

$ nmcli connection import type wireguard file /etc/wireguard/wg1.conf
$ nmcli connection modify wg1 connection.id warp-vm

Disable automatic connection when resuming from sleep:

$ nmcli connection modify "Warp VM" autoconnect no
$ nmcli connection show "Warp VM" | grep autoconn
connection.autoconnect:                 nein