Maybe showing how it moved geographically over time, because the place of Amun is quite and distance from the place of Amen. And they were separated by like 1000 years.

It's like saying that because people say "rah rah rah!" at a football game, they're worshiping the sun god ra.

It's somewhat convincing but I'm still on the fence. Extraordinary claims require extraordinary evidence.

And I may also agree that it's where that phonetically comes from, but to say it's actually an intended secret reference to Amun is a separate thing. The latter requires more proof than the former.