Realtek does publicly host the driver. Use DriverIdentifier or Snappy Driver Installer (caution: avoid scam sites). The hardware ID (from Device Manager) is key:
Windows 11 often has the driver available but does not install it automatically during the initial setup. usb20crw driver windows 11 top
You downloaded a 32-bit driver for a 64-bit Windows 11. Realtek does publicly host the driver