Why was Iblis expected to bow to Adam if only angels were asked?
Surah Al-A’raf says:
“And surely, We created you (your father Adam) and then gave you shape (the noble shape of a human being), then We told the angels, “Prostrate to Adam”, and they prostrated, except Iblis (Satan), he refused to be of those who prostrate.”
This is also the case in Surah Al-Baqarah.
Why was Iblis supposed to bow before Adam if he wasn’t even an angel (even if he was given the status of an angel, he wasn’t actually one)?
The idea was primarily to accept and bow before God’s plan. Even though Iblis was a Jinn, he was a part of the assembly where this episode took place. It is part of the style of not just Arabic but many other languages that when a group of people are addressed, they are addressed by a title that takes into consideration the dominant representation of that group. That doesn’t rule out the presence of minorities. Many verses of the Quran, if grammatically analyzed, are addressing men, but they are equally applicable to women as women.