I think he's a better negotiator than Biden so he may be right about no wars right now if he was still the POTUS. You can probably look at Kim Jong Un's crossing of the South Korea border during Trump's admin and normalization of relations in the middle east as an example. He may still continue the US influence or presence in other countries but I doubt he would escalate things. He understands that it would cost more for the American people if wars actually broke out.
Trump, by no means is a pacifist. But being a businessman, he understands the costs being involved in waging a war and his argument is that the amount should be better spent at home helping the needy families. That is diametrically opposite to the policies from Biden, who has restarted the American military interventions in third world countries ever since he took over the presidency. Till now, the United States have provided $44 billion worth of financial and military aid to Ukraine (ever since the war began). Now compare that to the $82 billion military budget of Russia.