Channel-level reporting for PMax - what is everyone using in 2026?

Asking for a current answer because everything I can find on this is at least a year old and the reporting has moved twice since. The question is the same one it has always been: how much of a PMax campaign's spend went to search, how much to shopping, and how much to the display and video inventory that tends to produce enormous click counts at tiny CPCs. It matters because the blended cost per click is meaningless when it averages a £2 search click with a £0.04 display one, and because a campaign that looks efficient often turns out to be efficient at buying the cheap stuff. What are people using now? I am specifically interested in whether anyone has found something that reconciles to the campaign total, because every partial view I have used leaves an unexplained remainder and an unexplained remainder is not an answer.