only source i found is here:
https://www.akminer.com/all-products/the-worlds-first-the-most-power-efficient-28nm-lyra2rev2-asic-miner-dayun-zig-z1
They say it has >7.0Gh/s

But on the other hand, in the Dayun shop i can only find the standard Z1:
https://dayun.company/shop/

So i think there is no new miner coming...but who knows.