We have decided to support the variant XQ-DC72, too. It has two physical SIM slots, one of which can be used for a SIM card or an SD card. Our documents need an update. XQ-DC72 shares the code base with XQ-DC54 but requires a different configuration. We will create dedicated flashable images for these two variants.
XQ-DC54 has the eSIM, one physical SIM slot and an SD card slot. Unfortunately, Sailfish does not support the eSIM. Therefore, XQ-DC54 works as a single SIM phone.