Not these designs. They take a bitstream , do DSP, do the digital conversion to PWM and feed the output. So the actual integrator and filter is the output. There is no DAC on their input.
@tvrgeek What you are describing above means that the DAC is at the input of the class D amp portion of the product. Put another way, the PWM portion of the circuit is at the input of a class D amp, not its output.
Digital at its fastest might be 192KHz sampling frequency. Class D amps often switch at 500KHz or higher. You can design a DAC that can produce a PWM output, but it really does have to be at the input of the class D amp in order to work. I know a lot of companies say they have a 'digital amp' but if they also say its class D then the DAC is always at the input to the class D circuitry.