When installing Windows 10 ADK 1607, the App-V Sequencer component may be missing. This depending on the Operating System you're installing Windows ADK on. When you need to install the App-V Sequencer from Windows 10 ADK 1607, make sure you install it on Windows 10 1607 as well. Otherwise use the Microsoft Desktop Optimization Pack (MDOP) Setup Media instead.
When running on Windows 10 1511/1507, Windows 8.x, Windows 7 or Windows Server 2012 R2, App-V Sequencer is missing.
When running on Windows 1607, App-V Sequencer will be back again :-) Other components are available then as well.
Hope it helps!
More on App-V in Windows 10 can be found here: Both App-V and UE-V integrated in Windows 10 Enterprise now!