Can't build firmware for rak4631 (XIAO nRF52840)

[kkwestt]

Can't build firmware for nrf52840 (XIAO nrf52840 and rak4631)
i'm use xiao nrf52840 + e22-900m30s 1w

I tried two bootloaders:
xiao_nrf52840_ble_bootloader-0.7.0-22-g277a0c8_s140_7.3.0.zip
and
WisCore_RAK4631_Board_Bootloader.zip

My steps:

• download firmware RNode_Firmware-1.79.zip
• unzip
• edit file RNode_Firmware-1.79/Boards.h to my pins
• console run:
• make prep-nr
• make firmware-rak4631
• enter my device to DFU
• upload-rak4631
• make release-rak4631
• make release-hashes
• then goes to flasher site https://liamcottle.github.io/rnode-flasher/
• Select my device rak4631 and flash file from RNode_Firmware-1.79/Release/rnode_firmware_rak4631.zip
• and Flash Now

it's all, no display, no ble, no serial, cannot do 3. Provision EEPROM and 4. Set Firmware Hash
nothing does not work

questions:
am I doing everything right?
where can I find instructions for 4631
what kind of bootloader do I need?