【Unofficial/Unsupported】WEB-U-BOOT
When your device soft-brick no need with TFTP recovery&Serial TTL
About U-BOOT and QSDK move in new topic
【Unofficial/Unsupported】uboot:https://forum.openwrt.org/t/ax3600-ax6-web-u-boot-merge-partitions/145963
【Unofficial/Unsupported】qsdk:https://forum.openwrt.org/t/qsdk12-19-07-fw-2-7-for-ax3600-ax6/145982