Probably referring to stuff like India/Pakistan where India came out and stated that Trump had nothing to do with the resolution. There was also the peace deal brokered with Qatar regarding fighting in the Congo which majority of people probably paid little to no attention to (because hey it's the Congo).
Given Trump's failures with the Houthis, involving himself with Iran, and fucking up with Ukraine, many MAGA people are eager to find anything they can hallucinate was a success of Trump's regarding foreign policy.