Sorry my post was easy to misread!
And indeed it seems to be the same across the Boeing fleet but indeed I can't confirm either if the 744 has got this function. I don't think so since they are you using a similar sort MCP.
And Why would V/S be available if you are in ALT HOLD or VNAV PATH modes?
As Captain Stable says maybe V/S will be annunciated on the FMA but it seems not logic to me that you can actually wind a different V/S in than 0 in ALT HOLD mode.
Definitely not on 73 75 76