It is in the SDA. Everyone who carries a gun in Oklahoma really should read the SDAI tried looking but couldn’t find anything. But that still won’t stop someone from trying, causing you to hire lawyers, added stress etc.
I believe the relevant section is page 42
TITLE 21 § 1289.25 PHYSICAL OR DEADLY FORCE AGAINST INTRUDER
F: A person who uses defensive force, as permitted pursuant to the provisions of subsections A, B, D and E of this
section, is justified in using such defensive force and is immune from criminal prosecution and civil action for the
use of such defensive force. As used in this subsection, the term "criminal prosecution" includes charging or
prosecuting the defendant.