the wireguard netplan is being created in the wrong format - still creates tunnels instead of nm-devices

How to recreate my error:
I ran it on CM4 arm64 architechture with Ubuntu Server 20.04 with :
netplan.io at 0.103-0ubuntu5~20.04.6 arm64
network-manager snap at 20/stable: 1.22.10-11

- Install network manager snap:
    sudo snap install network-manager

- Remove network manager that is installed as apt package(if any):
    sudo apt remove network-manager

- Install wireguard and wireguard tools:
    sudo apt install wireguard wireguard-tools

- Create a wiregurad conf file in /etc/wireguard in the format:
    Ref: https://www.wireguard.com/quickstart/
    #########
    [Interface]
    Address = 10.0.0.5/32
    PrivateKey = <private key>

    [Peer]
    PublicKey = <public key>
    AllowedIPs = 10.0.0.0/24
    Endpoint = < end point>
    PersistentKeepalive = 20
    ##########

- bring up this connection:
    sudo wg-quick up <conf file name>

    This would perform the following steps:
    [#] ip link add <conf file name> type wireguard
    [#] wg setconf <conf file name> /dev/fd/63
    [#] ip -4 address add 10.0.0.5/32 dev <conf file name>
    [#] ip link set mtu 1420 up dev <conf file name>
    [#] ip -4 route add 10.0.0.0/24 dev <conf file name>

- This creates a NM snap connection which would be active and also creates a netplan in /etc/netplan:

- Run netplan generate, this would fail because the netplan generated is in wrong format:
    sudo netplan generate

- Returns:
    missing 'mode' property for tunnel
      renderer: NetworkManager
      ^

- the netplan generated is:
    network:
    version: 2
    tunnels:
      nm-name:
        renderer: NetworkManager
        addresses:
        - "<address>"
        ipv6-address-generation: "stable-privacy"
        networkmanager:
          uuid: "<uuid>"
          name: "<name>"
          passthrough:
            connection.type: "wireguard"
            connection.autoconnect: "false"
            connection.permissions: ""
            connection.timestamp: "1647848473"
            wireguard.listen-port: "59015"
            wireguard-peer.<peer-id>.endpoint: ""
            ipv4.dns-priority: "100"
            ipv4.dns-search: ""
            ipv6.dns-priority: "100"
            ipv6.dns-search: ""
            ipv6.method: "ignore"
            proxy._: ""

- Reboot the system:

- Upon reboot you will observe that the wifi is down:
    nmcli d
    nmcli c

- To recover remove the files related to wireguard at : /etc/netplan
    sudo wg-quick down <conf file name>

- reload Nm connections:
    sudo nmcli c reload