I don’t understand...
I assume The 12 Apostles have long turned to dust.
I am not aware of evidence to the contrary.
Certainly, if any were Saints, these were
This seems like a varient of Necromancy
King Saul got in trouble for this...
The Bible is clear on this. “Saints” are simply believers in Christ, called by Him, chosen by Him and bought with His Blood, not works.
The Church does not claim that ALL those who lived saintly lives will be incorruptible. It only happens to a few, apparently at God's discretion.
"This seems like a varient of Necromancy King Saul got in trouble for this..."
Necromancy is when someone tries to contact the dead to gain information from them. That is what Saul did. A saint's body found to be be incorruptible is nothing like necromancy.
I was never taught this as a doctrine of the Church, through 13 years of Catholic education.