He hung the king of Ai on a tree and left him there until evening. At sunset, Joshua ordered them to take his body from the tree and throw it down at the entrance of the city gate. And they raised a large pile of rocks over it, which remains to this day. In any event, in the context of Paul's message, it refers to the cross. It is clear that we do not know the various forms of crucifixion that existed in antiquity, particularly in Egypt.
More research needs to be conducted on various forms of crucifixion in antiquity, inshallah.
The problem for the Qur'an is that crucifixion did not exist in ancient Egypt and you are well aware that you have no evidence to support your arguments. I pray that everyone who reads this response weighs the facts based on the evidence. Once again, the Qur'an makes a serious error, this time historical. In my mind, and heart, this is clear evidence that the Qur'an is the word of man and not the Word of an all-knowing God.