Only available in china mainland by now. Hope they open their aliexpress store soon.

But there are several boards you've been able to buy for a while already using the BL808 they show between their board and the Pico: the Sipeed M1s, and the Pine64 Ox64.

I am getting black on black text on my phone.

Still weak on the ADC front though.

rvv 0.7 I assume?

Dual THead C906, so yes. There are no signs of the C906 or C910 vector units being updated.