Reagan was a very pro-Israel president, but he was still willing to sell weapons to Saudi Arabia, even when Israel saw it as a serious threat. Trump could do the same.
It seems that the normalization agreement between the UAE and Israel did not involve the sale of F-35 jets to the Emirates.
Before those denials, the scuttlebutt revolved around how such a sale could impact Israel’s qualitative military edge (QME). And the option of the US selling the planes anyway, without it being a part of the deal Israel and the UAE sign, still remains.