Proposed resolution:

This wording is relative to N5054.

1. Modify [version.syn] as indicated:

   […]
   #define __cpp_lib_reference_wrapper    202403L // freestanding, also in <functional>
   #define __cpp_lib_reflection           202603L // also in <meta>, <type_traits>
   #define __cpp_lib_remove_cvref         201711L // freestanding, also in <type_traits>
   […]
   

Paper P2996 added feature-test macro `__cpp_lib_reflection`, exposed only in <meta> (and <version>). It also added entities to <type_traits>, such as `std::is_reflection`.

The mentioned feature-test macro should therefore be added to <type_traits> as well.