How to find "mt7622_nmbm_rfb_defconfig" to build u-boot 25.04?

Banana Pi Router design BPI-R64(MT7622)
1

Hi. I’m try to build for uboot(+NAND)

I was download offical u-boot source from like this.

git clone https://github.com/frank-w/u-boot uboot.org

And refer this guide.

[Tutorial] Build, customize and use MediaTek open-source U-Boot and ATF - Banana Pi Router design - banana pi single board computer open source project official forum BPI team

This guide said to me that use " mt7622_nmbm_rfb_defconfig". but i cant find this file from u-boot source code.

Could you help me?