I didn’t say if God changed though, I said if God changed what they willed. From some quick Googling (I haven’t actually read the bible), this seems to happen in the bible (Jeremiah 26:13). God can change their actions without changing themself.

The Euthyphro dilemma is moreso about polytheistic religions. It doesn’t work with nor was it written about Monotheism.

2 millennia of Christian philosophy would disagree with you there.