Please let us start with correct statements. The driver does support Wasapi in Windows 10. But the driver lacks the capability to let applications change the sample rate, so you have to manually do this in the driver's Settings dialog. This is caused by the driver being capable of multi-channel, multi-client WDM/ASIO operation as well as multi-interface usage. The driver was not designed and built to support just two channels of playback.
And this will not change. Please use ASIO for automatic sample rate changes.
ASIO also has the advantage to support sample rates above 384 kHz, not screwing up Windows' Audio Enhancements above 192 kHz sample rate, and not needing workarounds to support higher DSD rates by packing more data into half the sample rate (768 kHz = DSD256).