If the bootloader is intact (which it seems to be), you can likely re-flash it using the correct firmware for MR60FDA2.
Switch to OTA Mode in the flashing tool (you already have it selected).
Ensure baud rate is correct – try 115200 if 9600 doesn’t respond.
Click “Request Update” to initiate the OTA handshake.
If it responds and enters OTA update state, select the original firmware (specific to MR60FDA2) via “Open File” and flash it.
If OTA fails, try UART mode instead.