The fact that a property has been set does not by itself trigger functionality.
The default value must be legal.
Setting it to the value it already has is not a crime.
No one left standing.
Putting them in the flow.
It's already there, just under a different paradigm.
auto parameters make this easy to write, particularly for lambdas.
FILETIME to a C++ clock like std::system_clock or winrt::clock?
The winrt::clock has a conversion for you.
False backformation.
If they aren't shown, then they aren't automatable, so there's no requirement that they exist in the UI automation tree.