Proof the US govt says UAP exist

I watched a podcast the other day but I can’t remember who said it but it was someone known as respectable in the field.

He said Trump commissioned a report to prove the existence of UAP and although it was barely 9 pages, it did acknowledge “these things are probably real”

I can’t find anything on the net to confirm this, I’ve heard other figures say the govt say they exist so does anyone have a link or evidence the govt said this. There must be something but I can’t find it.