Probably because it's not really a brand new AMD motherboard?

I'd expect/hope to see whatever comes after Strix Halo in a Framework motherboard. That's when you should be looking for LPCAMM2 for AMD.

Not sure fhe Halo series will be LPCAMM compatible. The framework with the Halo chip is soldered.

I looked into it a little and it does seem like LPCAMM2 just can't provide that memory bandwidth through a single socket and dual socket would be overly complex to wire up. Bummer :-(