CAC confirmed a test flight of a canard fighter has been carried out on Dec 28, 2022, completing the last test flight task of CAC in 2022.

A first flight ceremony and a J-20B (or J-20III as dubbed by Huitong) were spotted on Dec 28.

So piece the two together, this is all you got. No flying photo, no rear view, no clear pix. BTW Xi is said to visit Chengdu that day. It's clear that officially nothing has been acknowledged, unofficially the rear view of J-20B is not allowed to be shown.