A1 silicon: The recommended BSP is LF 6.6.52_2.2.x
Please download demo image L6.6.52_2.2.2_MX95
And use image imx-boot-imx95-a1-19x19-lpddr5-evk-sd.bin-flash_all
I just verified the following command, it worked.
uuu.exe -b emmc imx-boot-imx95-a1-19x19-lpddr5-evk-sd.bin-flash_all