BCM63281 Tp-Link W8960N v4

Hello.

I have a Tp-Link W8960N v4 device.
OpenWRT has support for v1 of this, but v4 is different. v1 SOC: BCM6358, v4 has: Bootloader - BCM96345 / CPU - BCM63281 / Radio - BCM43227.
OWRT has not made any progress on BCM 63281, but LEDE cites this chip on TOH as possible support
My Q: Has anyone worked on v4 W8960N? If not, what's the status of WIP and how can I test?

Serial boot log output posted on OWRT Forum: https://forum.openwrt.org/viewtopic.php?pid=179455