I have programmed the OTP fuses in U-Boot to set the MAC by following this guide.
https://wiki.st.com/stm32mpu/wiki/How_to_update_OTP_with_U-Boot#:~:text=The%20fuse%20command%20allows%20you,(for%20a%20temporary%20update)

This appears to have work because from boot up in U-boot I get

When I run the firmware and check the ifconfig values the MAC address of F2:AA:7A:45:5C:12 does not appear anywhere.

Does anyone know what is happening here and how I go about setting a static ethernet MAC address please?

Many thanks

Stephen