The 6 most common reasons why Pine64 won't boot

[Andrew2]

So the Android type images want to be able to adjust their data partition size on install. Good to know. Thank you!

I wouldn't call this 'on install' but 'on writing the image to the media' instead. Historically Allwinner devices have been tablets or OTT boxes with included NAND/eMMC and vendors used PhoenixSuit (or LiveSuit on Mac) to burn images onto the internal flash storage (size obviously varying between different devices). That's where this strange Android image format originates from and that this hasn't changed in all the years is mostly because none of the vendors selling Allwinner hardware spends a dime on software improvements