Hello !
Assuming your workload was suffering from the small workload perf issue we had on the previous driver you should try the new driver ‘Preview for CUDA on WSL Updated for Performance’.
That driver actually has a couple of new optimization to strongly boost the perf of apps that were bottle necked by the small workload launch overhead.
This is far from the last set of optimization we plan to do so performance should keep increasing. But there is a good chance that driver might make your GPU utilization better now.
Let us know how it goes !