Where did you get that idea?
As you can see in the chart below from the BBC, Obama issued fewer EOs than any recent two-term President. During Obama's first term, he issued fewer EOs than any recent President during the President's first term, including Trump. In fact, the truth is the exact opposite of what you said. Obama was the most conservative President in the use of EOs. During his first term, Trump was the least conservative in the use of EOs.