This driver does not implement all available AT commands of the SIM7020 modem. It's enough though, to get an NTP time stamp and send data via HTTP and MQTT.
Check the pico example to see e.g. how to send payloads with HTTP and MQTT.
Enable async support through the non-blocking feature flag. Checkout the embassy pico example.
Feel free to open an issue if you need support for specific other functionality.