In the ancient world there must’ve been hundreds or thousands of stories of kings who had to sacrifice their most beloved child to demonstrate faith in an otherworldly being.
Was Abraham the first or only to be spared, and if so why is Agamemnon not offered the same deal? Iphigenia plays very much like a variation on the famous Old Testament tale of faith and sacrifice - but to radically different ends.
Honing in on a very specific point in the Iliad, many versions of the story has Iphigenia whisked away by Artemis. There’s no such redemption here.
In many ways this is a spiritual prequel to Nolan’s The Odyssey, and it wouldn’t surprise me if this was an influence. Even the choice to dramatize this particular story, puts the Judeo-Christian moral filter over everything. A filter that was highly foreign and antagonistic to the actual Hellenistic Greeks - who claimed direct ownership over these stories.
But “ownership” of stories and myths is as ephemeral as the winds that blow the Greeks on their course to Troy. Thousands of years later they belong to everyone who cares enough to remember.