Grease Pencil: Duplicate layer with its propeties animations

hi,in a while i want to have many layers that have the same animation properties, for example opacity animation of the layers have the same thing.

so i was thinking on first,'as example', before create many layers, i can create one layer animate its opacity then duplicate it many times to have the same animation of opacity for all layers. note, i want to avoid drivers to have the ability to make some tweeks when needed in the graph editor or dopesheed

but this don't happen by 'duplicate' that is available now it act as copy past the content of the layer to a new autocreated layer but not all related animation to it, is it ok ?

worth to mention, if we duplicate an object in blender all related animation is also duplicated but that is not happening if we duplicate layers

i know we may need only duplicate the content of the layer without its properties animations but also we may need the animation to make only a new version of the duplicated layer with tweeked animation

or also changing a bit duplicated layer strokes and preserviing animated properties of the layer (like layer opacity and transforme.... etc) and thier the f-curve modifiers

for me having two option with/ without animations will be awesome