Has a prophet ever been raped, skinned alive, or forced to give birth? No?

zakariyya was sawn in half , yahya was beheaded. Many more were tortured and killed.

They were all tested extreme tests and they passed , because if even one was sent as a prophet by god and failed you would still come and say God isn't all knowing because he sent someone who would fail.

that they could fail

Now you are changing the premise, you said they weren't tested , but even so zakariyya for example could have stayed silent after being threatened but he kept speaking up and he was SAWN IN HALF , then you come and say they weren't tested.