It does indeed depend on the aiurcraft type and the cabin position of the FA jumpseat. For instance, on a
B-767-200/300, jumpseats are located at doors 1L/R and 2L/R with virtually no view outside. (to see through the 767 prism glass in the door, you must stand and look through it. On the A310, same situation.
On aircraft such as the B-747-100/200/400, DC-10,
L-1011, there are cabin jumpseat positions where FA's can indeed view outside through pax windows located right by the jumpseats.
But all in all, the majority of aircraft FA jumpseats are located at the fwd and aft cabin, where, aside from the tiny windows on the exit doors, there are no pax windows. Also, bulkheads, closets, galleys, etc, in effect "seal" these areas off from the pax cabin.
Hope this helped.