Angels Prostrating To Adam
First of all, prostration does not always mean shirk. Prostration of respect is mentioned in the Quran in the story of Yusuf AH as well (Quran verse 12:100). Secondly, the source of all directives for us is God. He can lift any restrictions at any time. For example, alcohol is prohibited to us in this world, but Quran tells us that wine will be made available to the inhabitants of the paradise (Quran verse 47:15). Lastly, the story of Adam and Iblees is stated in the Quran very clearly and all the characters in that story (God, Adam, Eve, Angels, Iblees) are very distinct. There’s no reason to come up with speculative ideas and end up inadvertently corrupting the word of God.