USB compliant interfaces go up to every sample rate and bit-depth the OS supports. That's 192 kHz, 24 bit in practice.
Even the Behringer ones have supported that for ages. The UMC404 was very popular on Linux exactly for that reason.
Next Time you work alongside the original pcm290x design team, give me a call.
Audio class compliance means if the silicon reports the capability, that it can go up to those rates.
Pcm29xx was designed in the days of 11Mb/s usb. Everything from the USB rate, to the Spact pLL clock recovery circuits Limit the device to 48kHz.
The original class compliance for usb1.1 audio (which was grandfathered into 2.0) worked like a dream and continues to do so.
I do wonder what they used for the 404. The dice2 chip?