One of the deficiencies of Roon, as compared to other music serving solutions, is that it doesn’t keep an easily accessible log of clipping occurrences to easily verify your adjustments.
Consequently, you’d have to stare at the signal quality star for extended periods while trying to properly set headroom.
Better use a test file to unambiguously set and forget the appropriate headroom adjustment.
See following post of mine with a link to such a test file …