Flashing Spreadtrum/Unisoc chipsets is different from Qualcomm or MediaTek. You will use (also called SPD Upgrade Tool) or Spreadtrum Factory Download Tool .
The "1h10 native firmware" is a myth—every vendor adds:
Some SP7731E 1H10 tablets include 4G LTE modems (usually a Spreadtrum SC2721G power management IC paired with an SR3595D transceiver). Flashing the wrong modem firmware or a full wipe without a backup can erase the IMEI. Native firmware often includes the necessary nvan and prodlib files to restore the radio.