Hands off management doesn't mean unawareness of major projects.Because Bush was the CIA honcho with a vendetta against Iran. He was accustomed to covert evil. Reagan was notorious for his hands off management style. Bush could have run that war without telling Reagan anything he didn't want Reagan to know.
Bush had means, motive, and opportunity. I see no reason for Reagan to even care.
Tom
ETA I am sure that, with the clarity of hindsight, some Iranians really regretted helping Reagan/ Bush beat Carter.
Even Congress knew much....
United States support for Iraq during the Iran–Iraq War - Wikipedia
Reagan wasn't briefed on this?.....
Exclusive: CIA Files Prove America Helped Saddam as He Gassed Iran
I don't believe he'd overlook such major foreign adventurism.