hi, I want to use ObjectMerge sop merge a subnet, but it seemed not worked with “/obj/mySubnet” path value . Anyway can to this ?
Thanks!

Try /obj/mySubnet/* … the ObjectMerge SOP actually wants geometry node paths, but it has a special case where if the path is an object, then it takes the display flag child (or render flag child). So when you just have an object subnet, it gets confused.

If my subnet has also child subnet. How to import them all one time?

That's trickier. I haven't tried but maybe /obj/subnet/*/*

Well it's actually working, but it doesn't seems to accept multiples shaders… So there is only one of the shaders that contains the subnet ! Is there a way to correct it ?

I need to instance multiple subnets and keep all my shaders.

I think you'll need to use Material SOP nodes to assign your shaders.