How to set all layers as input on cli same as plugin

Hello,
I need to find how to add into the command line the option showed on the gimp plugin for all visible layers on the input/output section.

I only use
gmic.exe -input MDSC_0303_IT2.tif MDSC_0310_IT2.tif -blend average normalize 0,65535 round -output test2.tif

As I can’t do it it seems on the command it is considering to use the option active and below as the result looks similar to that one.

Any idea how to do this change

?

Works for me. E.g.,

gmic sp tiger,flower,chick r . blend average n 0,255 round o blend.jpg

r . means resize everything to chick, which isn’t necessary since your images have the same dimensions.