I would like to contribute improvements to u-boot to enable support for the Orange Pi Zero 2W board. I think it is not very different from the Orange Pi Zero 3. The board has an Allwinner H618 SoC. I already tried to run u-boot on my Zero 2W using a similar configuration of the Zero 3 with the devicetree file taken from the linux kernel ( sun50i-h618-orangepi-zero2w.dts).
https://github.com/torvalds/linux/blob/master/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero2w.dts Thanks in advance. Federico