Bad news: board is bricked and you’ll need a ch341a and wson 8x6 clip to fix.
Good news is it fixable with those 2 tools.
https://github.com/openwrt/openwrt/commit/915fd357fd06139ac436f246800c2eb55202cba2 fixed this
Follow Adding support for TP-Link XDR-6086 - #168 by kastellsc for more info