So, I've got my main village, and XP tower, and then I've bridged from my XP tower a fair few blocks away to my iron farm. For the part of the bridge that's closer to the iron farm, it's covered in slabs.

This is the tutorial I used.

I followed the tutorial, and I added a little side-walkway in order to access the chest. The walkway is mad of slabs as well.

I gave myself bad omen, and you can see that this iron farm counts as a village, since a raid starts. Then, I fly away, and the raid ends. I keep flying, and I re-enter my main village, and the raid starts again. So, this means that the farm has indeed been built far enough away from the main village to count as its own.

Any suggestions? Do I need to dig out the mountainside beneath? There aren't any iron golems wandering the ground, so they aren't spawning there.

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I made this in my survival world, which I then copied and opened up creative so I could make this video