I created a world with random world generation on version 1.17.40 on iPad mini 5 ios 15/15.01/15.02(without touching anything in the settings): -410343875(this is the key).
You can see in the images what came of it.

1) clearly even squares in the field are a clear mistake in my opinion.
2) tunnels in one-2 blocks with water that for some reason flows too unnaturally.
3) in the savanna gorge from mountain to lava ? This is not one strange gorge in this side, but it stands out because it seems to have cut this mountain
4) villages are so common that they can be seen at a distance of drawing 20 chunks.
5) there was a temple near the village. I didn't have any chests!! Creating a new world in creative mode with this led on 1.17.41 and ios 15.1 reaching this place, they are(maybe it has been fixed).
6) in one of the villages to spawn zombies (spawn location could not be determined, maybe it's just a dark place under the earth) and kill the inhabitants DAY!
7) constant problems with vegetation. In every village there is a problem on farms, in which due to the height difference, water constantly flows in different directions. The problem is not in the water. For example, in the Java version, the vegetable gardens are on the same level and fenced with blocks. In the mobile version, the beds do not spawn at the same height, and they need water. And it turns out that instead of crops there is just land.
8) maybe I don't understand well. However , the map should reflect the terrain ? That is, by drawing a circle and approaching it, a circle should be displayed on the map? But there's something wrong with my card. I have a Savannah and the land is darker there. Why then does my map display gray blocks ? Similar to a cobblestone or gravel ?

PS: I do not know if this is possible, but one night I was driving along this biome towards the house there was a gorge and mobs. I had a cat with me, I slept and went up the water source and continued my journey on horseback. When I arrived home, I did not find my cat. I was guided by the map. But I didn't find my cat there. Because I didn't find my gorge there! Maybe I'm wrong, but I ran around the neighborhood and didn't find him. It was huge, I wanted to capture it (because it was also through the mountains, and deep into the lava). I could not confuse it with another world, because I have only one.

I flew and found another dangen and there are no chests in it either (this is the same key only in the creative)

The problem with sudukami is not only in desert temples (in the photo there is also a pressure cooker without a chest)

Also, for some reason there is snow on the tree, but there is no biome here (perhaps these 3-4 blocks are defined through the console as snowy, but visually it is a different biome)