1199:68a2 is a device in QMI mode, 1199:68a3 is in DirectIP mode. You cannot use AT!SCACT to connect in QMI mode.
Ask your FAE how to change it to DirectIP mode or use QMI drivers + userspace utilities. I’d of course recommend the qmi_wwan driver with libqmi, but I’m not neutral. The Sierra Wireless Linux QMI SDK is another alternative.