Decompose component in brace layer

Hi guys,
Is there a way to decompose all components for every glyphs in a font, including the brace layers? When I use Cmd-Shift-D, it decomposes the masters but not the brace layers, I have to decompose it one by one
Thanks for your help!

I believe it only decomposes the visible layer, be it a master layer or any other kind of layer.

Is there any way to make all layers for selected glyphs visible at once?