He brought peace to the Middle East.
Bahrain and UAE, two rather small countries who were never at war with Israel, opened diplomatic relations with IL. A promising development which could lead to more. (Morocco and Sudan did as well, but hey aren't really part of the ME).
Otherwise, Trump salivated over the prospect of selling more military weaponry to Saudi Arabia to help them bomb the poorest country in the ME and kill more Yemenis in the 7th year of that ongoing human disaster.
Of course war profiteering is the GOP way.
Trump did nothing to help bring peace/resolve the warfare in Syria and Libya.
The US essentially has absented itself from these wars. In Libya I believe Turkey, Qatar, and Italy have propped up the intl recognized gov't in Tripoli, while Egypt and the Saudis/UAE are backing the general in the East. While the most powerful country is nowhere to be seen, not even negotiating peace settlements or warning Egypt about rolling across the border.
What Trump has done is give Putin and Erdogan, two autocratic strongmen he admires, increasing power and influence in the region. And they are about power, not peace.
And that's just talking about the active wars. Not even getting into how the Trump Admin screwed over the Kurds and Palestinians, as that never has negative consequences down the road.
Also, reneging on the US commitment to the Iran Nuke Deal and ratcheting up punishing sanctions has led Iran to increase its nuclear enrichment and increasingly engage in provocative/dangerous behavior, whereas Obama had Iran bound into a peace deal with plenty of economic incentives.
I'd say the Trump Admin has done a shameful job of handling the ME. Basically Trump's hands-off, America First policies has emboldened dictators such as Erdogan and the Saudis and UAE to unleash whatever destruction they prefer.
Last few years, the Saudis continued to decimate the starving Yemenis, dismembered a Washington post journalist in Turkey, kidnapped the Prime Minister of Lebanon and forced him to resign, and held most of its elite hostage and stripped them of their wealth under extreme coercion, and blockaded Qatar threatening them with war if they didn't shut down Al Jazeera (who wants a free press?) and stop being friendly with Iran. Very peaceful. Very stable. Great Trump ME policy.