Details: I'm using VS2019, and it works as expected with vcpkg install *:x64-windows. All includes are recognized and linkage works as well. Problem: I created custom triplet x64-windows-v1...

//***** stl::remove_reference **************************************************
//
// Since C++11
// Реализовано по причине отсутствия в std IBM i удаления правой ссылки
//

template <typename T>
struct remove_reference      { typedef T type; };

template <typename T>
struct remove_reference<T&>  { typedef T type; };

template <typename T>
struct remove_reference<T&&> { typedef T type; };
////////////////////////////////////////////////////////////////////////////////





//***** stl::forward ***********************************************************
//
// Since C++11
// Реализовано по причине отсутствия в std IBM i

template <typename T>
T&& forward(typename remove_reference<T>::type& Arg)
{
 return static_cast<T&&>(Arg);
}

template <typename T>
T&& forward(typename remove_reference<T>::type&& Arg)
{
 return static_cast<T&&>(Arg);
}
////////////////////////////////////////////////////////////////////////////////