What he did last time is probably a good guide.
Within the fist couple of months of taking office he gave a joint press conference with Netanyahu in which he announced that the US was no longer committed to a two state solution. He said something along the lines of “whatever Bibi likes”.
He announced that the US would recognose Jerusalem as Israel’s capital, undermining the importance of Jerusalem as a “final status” issue to be decided only as part of a substantive peace deal.
He chose the anniversary of the Nakba to move the US Embassy from Tel Aviv to Jerusalem. 1000 people were injured and dozens killed when Israeli forces fired into crowds of protestors.
He gifted Netanyahu a map of Israel with all of the Golan Heights shown as part of Israel (it is not sovereign Israeli territory). Then, being the statesman that he is, he drew an arrow in black sharpie pointing at the Golan Heights annotated with the word “nice!” next to it.
Mike Pompeo announced that the position of the US government was that Israeli settlements in Gaza were not illegal under international law. The UN, EU and almost every major world leader then had to come out to say that yes, they were.
Trump then held Middle East “peace talks” but only with Israel and came up with a peace deal that essentially said that Israel gets to keep all of the settled land, practically all of the Jordan River Valley and had to make no concessions towards creating a Palestinian state. He claimed to have solved the Middle East conflict. It’s surprisingly easy to negotiate peace with only one side in the room, it’s weird that nobody thought of it before.
Israel then annexed loads of land that the UN says is not theirs and settlement building and evictions in the West Bank have continued apace ever since.