The older Giant PA2's were 38mm alloy. Most I've seen in a wheel you can readily find. They were the stock wheel on 2015 or so Propels and Trinity bikes.
HED jets are alloy with carbon fairing. So alloy wheel with just the non structural aero part being carbon. Same for Flo. IMHO that's the way to go if you don't want full carbon but want deep profiles.
Often gravel folks ask this question. Without realizing you need a really really wide wheel to match the tire and have the aero be remotely useful. They worry of the all carbon on gravel and damage. A legit concern. The cross use of a deeper wheel is mud depth, not aero.
IMHO if you're dead set on this and all alloy.......get a used set of those Giant PA2. I had success setting up a set tubeless and run them as my cross/gravel wheelset. I did so as they were laying in the shed, so why not.