i Series Navigator (Ops Nav) can do it. I’ve never done it because we have HA software.
If the user profile names are the same, OS versions/releases are compatible and the QPWDLVL system values match, the Retrieve Encrypted User Password (QSYRUPWD) and Set Encrypted User Password (QSYSUPWD) APIs can be used to retrieve and set matching passwords.
V5R3 and V5R4 are examples of compatible releases. I think that V5R4 and i 6.1 are not compatible, but I’d really need to test to be sure.