How to connect the sim card on a DELL laptop. Ubuntu 20.04

I want to connect to the mobile network using the sim card slot on my new Dell Precision. I have never done this.

I have checked that the WWAN card is there:

$ lspci
...
02:00.0 Wireless controller [0d40]: Intel Corporation XMM7360 LTE Advanced Modem (rev 01)

But there is no option to configure it in Settings>Network (only sections for "Wired" and "VPN" appear).

Any help would be much appreciated.

Other information

$ rfkill list
...
2: dell-wwan: Wireless WAN
    Soft blocked: no
    Hard blocked: no

$ nmcli 
wlo1: connected to HOME_WIFI_NAME
        "Intel Wi-Fi"
        wifi (iwlwifi), 4C:79:6E:AA:86:3D, hw, mtu 1500
        ip4 default
        inet4 192.168.1.131/24
        route4 0.0.0.0/0
        route4 169.254.0.0/16
        route4 192.168.1.0/24
        inet6 fe80::9f37:8cbc:7d9b:dc5d/64
        route6 fe80::/64

p2p-dev-wlo1: disconnected
        "p2p-dev-wlo1"
        wifi-p2p, hw

eno2: unavailable
        "Intel Ethernet"
        ethernet (e1000e), 38:14:28:1D:B5:5B, hw, mtu 1500

lo: unmanaged
        "lo"
        loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

DNS configuration:
        servers: 212.230.135.2 212.230.135.1
        domains: Home
        interface: wlo1

Native support wasn't added yet but it's being worked on.

Meanwhile try the following drivers/software:

mkdir ~/tmp/
cd ~/tmp/
sudo apt install build-essential python3-pyroute2 python3-configargparse git
git clone https://github.com/xmm7360/xmm7360-pci.git
cd xmm7360-pci
make && make load
cp xmm7360.ini.sample xmm7360.ini  # edit at least the apn in the configuration file
sudo python3 rpc/open_xdatachannel.py
sudo ip link set wwan0 up

Source: https://github.com/xmm7360/xmm7360-pci