Windows 11 includes native USB Video Class (UVC) drivers. This means that when you plug in a Logitech C270, Windows 11 should automatically detect and install a generic driver that makes the webcam functional for basic video calls (Zoom, Teams, Skype, etc.).
If you're having trouble finding or installing the driver, you can try using the built-in Windows 11 driver. To do this: c270 hd webcam driver windows 11