No IBIS in the Zfc, so in this case no stabilization. None in Z50, not sure in Z5 (no IBIS? likely)
Works with Z6/Z6II/Z7/Z7II and I'll assume it works with Z9's IBIS; no stabilization on any Nikon Dxxxx
Being an f:8 lens, it's good for having a lot of reach in good sunlight: very nice for flamingos in Camargue at noon, not so nice for BIF at sunrise/sunset...
Ciao from Massimo