2017 iMac FaceTime camera under Win 10 Boot Camp
2017 iMac camera works under Big Sur. Boot Camp Win 10 Device Manager shows Other Devices/ Facetime HD Camera (Built-in) exclamation point, no drivers available. Pointing Update Driver at the Boot Camp Apple WindowsSupport AppleCamera directory didn't find anything. Manually installing those drivers by right-clicking the inf reported success, but still no camera. Drive Booster says the camera drivers are up to date, which probably tells me all I need to know about Drive Booster.
iMac Line (2012 and Later)