The PowerView Motorization Hub lets users control, time, and set their window shades to raise, lower, and tilt on an automatic schedule. Originally released in 2017, the system only supported Amazon and Google services out of the box, but the company said at the time that support for HomeKit would come later the same year. However it appears to have only just surfaced.
After applying the update, users with the Powerview Hub Gen 2 should be able to enjoy HomeKit integration and control their window shades and blinds via Siri voice commands. If the support works as it was originally promised, users should also be able to incorporate shade settings into HomeKit scenes for full-home automation.