The CPU of Strix Halo has good BF16 acceleration, like any other Zen 4/Zen 5 CPU (the future Zen 6 will add FP16 acceleration).
I do not know about its GPU, which might have only FP16.
So it is likely that the right inference strategy would be to run any BF16 computations on the Strix Halo CPU, while running the quantized computations on its GPU.