Impulse bought this today while at Kmart, and can confirm that it runs at 4k/60hz (using a MacBook Air and Sony Bravia A9F TV). Seems to be a clearance product with plenty of stock around.
My only complaint is that this cable runs a little hot at the HDMI end, however, this is expected for an active cable.
It's also worth noting that I've previously purchased the following, which only outputted at 4k/30hz.
https://www.kmart.com.au/product/4k-hdmi-to-usb-c-universal-…
Since when was that older Kmart cable from second link $39? Been $15 for over 2 years from when I bought it for mum.