Yeah I think I wasn't really paying attention, I knew there wasn't much dirt above ground, I got all the dirt for farming from underground, but I hadn't really realized how _very_ little there was. Those 5 dirt blocks above the lava may well have been the only horizontal dirt I've seen above ground.
I did get some wheat seeds from a wandering trader so I haven't really missed the grass.
If I had some grass blocks I could get some flowers besides the ones from the trader but that's life.
I am surprised at how much water there is, the last time I did this it was nearly all sand with just a few ponds, now it feels more like an ocean just without the ruins.