Built an enderman farm in main world close to my base. Need advice

So I built an Enderman farm in the regular world, close to my base at the top of a mountain. The very top of the structure where the Endermen should spawn is

Anyone know why this enderman farm isn't working? : r/Minecraft

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I'm trying to make this Enderman farm in my 1.16.5 world. Could someone please tell me why they're not aggroing on the endermite? : r/Minecraft

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Why are there so many enderman close to my base? : r/Minecraft

How to make an Enderman Farm

How to Make An Enderman Farm in Minecraft (2022)

How to make an enderman farm in Minecraft 1.19

How to make an Enderman Farm

Tutorials/Defense – Minecraft Wiki

They said it was a crazy idea, but I built an underwater Enderman farm anyway : r/Minecraft