Device tree is in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/boot/dts/allwinner/sun50i-h618-orangepi-zero3.dts?h=v6.6-rc3
Maybe Linux 6.5 Kernal will contain support for orange pi zero 3. Looks promising.
https://lore.kernel.org/lkml/20230804170856.1237202-1-andre.przywara@arm.com/