Sure I use this and the other idea together into:

T {tcleval(vd=[to_eng [ngspice::get_node [subst -nocommand \{v($\{path\}[xschem instance_net {@name} {D}])\}]] ] )} 30 -60 0 0 0.15 0.15 {layer=15 hide=true}

Going for pin absolute voltage info from:

get_node v([xschem instance_net {M10} {D}])

Which is looking for:

T {tcleval(vd=[to_eng [ngspice::get_node {v(net123)}]] )} 30 -60 0 0 0.15 0.15 {layer=15 hide=true}

I have not found a use for

resolved_net

yet it seems to return the argument, even when the net does not exist. So I not use it for now until I read xschem .c code to understand it better.