I can't see the Base selection in the menu on SparkFun RTK Express Plus

I can’t see the Base selection in the menu on SparkFun RTK Express Plus. The firmware is the latest 1.10. There is a display of Rover, but Base is not displayed and selection is not possible.

https://photos.app.goo.gl/2CdrWSVNgjZLYT8G8

https://photos.app.goo.gl/TFAU8i7bWw3yZzdx9

Hi - The Express Plus uses the ZED-F9R with a built-in IMU. For reasons only u-blox is privy to, the ZED-F9R does not support base mode.