It's often possible to use a pixel driver to control pixels of different voltages to that of the pixel driver you have. As long as the driver you have is able to support the pixel protocol of the higher/lower voltage pixel you intend to control, you can use your pixel driver to pass data and ground to the pixels, while you use a separate power supply of the pixel's required voltage to splice in *VCC & ground * to the pixels you are using.

This arrangement ensures that voltage is not passed directly from your pixel driver to the pixel strip - which ensures that neither the driver, not the pixel strip is damaged by over-voltage.