"Souls can be recognised in the separate state, and are immortal although they once had a beginning".
It is rather difficult to argue that St. Iraeneus isn't saying souls aren't immortal after they are created. Once again, he also states:
Nevertheless they endure, and extend their existence into a long series of ages in accordance with the will of God their Creator; so that He grants them that they should be thus formed at the beginning, and that they should so exist afterwards.
I think Iraeneus if very clear that once God has created a soul, it exists forever.
“It is rather difficult to argue that St. Iraeneus isn’t saying souls aren’t immortal after they are created....I think Iraeneus if very clear that once God has created a soul, it exists forever.”
Boy, I don’t see where you reconcile what you and Boyce are saying with what +Iraeneus wrote about immortality being a gift from God to the holy. The souls of the wicked are not immortal. That is denied to them.