This - would for me provide a bit more context of how much the untracked energy is vs other measured devices - the vertical graph is great, but the more aggregated horizontal view also helps a lot imho.view also helps a lot.
Maybe voting for Add 'Unmonitored Energy' to energy dashboard individual devices - #5 by TRiSS is a good idea - should be a lot easier now it’s already added to the detail view.