I'm pretty sure the reason why the sun god isn't worshipped in Aman is because Aman is a city that formed around worshipping Cain and Agio as pair (Moon and Night). Cain also mentions that he only has half of what the sun god is capable of because he is just a moon god, so most we can probably assume that the sun god is the 'creator' deity in whatever pantheon exists in this universe.
No I believe they specifically mentioned aman worships the sun god and was built under his protection
Hmmm it's been a while so I don't remember where they mention that but tbh you could be right-- the only thing I can really remember that relates to that is a footnote from chapter 1 stating that "through service to the Gods of Moon and Death Aman is the only nation free from of the influence of vampires.". It's a reach but I assumed that based on that, it would mean that they explicitly worship only the gods of moon and death with the sun being another factor beyond what the church is interested in.
You could totally be right I may be mixing up the sun god having total supremacy vs the death and moon god having the worship of aman it gets confusing after a while
HOLD UP! Am I the only one who noticed this or are there any other that saw it too? Im talking about the fact that Cain says something about the sun God being able to create people and animals... Does it mean that there are more gods than just Cain and Agio? And if there are, will we see them? Its sooo confusing rn. I thought there were only two gods but this is a proof that it's not true. So I'm asking, how important will this God be? Bc from what I have read, the sun god creates, so was it them (sun god) that created their world? And if yes why didn't we saw them (sun god) being worshipped? Bc ppl worship Cain and Agio soo much so why not them (sun god)? Or do ppl worship them (sun god) in the other countries that were mentioned before??? Bro so much questions.
But don't forget, that this all is just my theory!
(=・ω・=)