This feature is not in Clang 13 and only has partial support

Author: AaronBallman

clang/www/cxx_status.html

@@ -944,7 +944,7 @@ <h2 id="cxx20">C++20 implementation status</h2>
       </tr>
       <tr>
         <td><a href="https://wg21.link/p2092r0">P2092R0</a></td>
-        <td rowspan="1" class="partial" align="center">Clang 13</td>
+        <td rowspan="1" class="partial" align="center">Partial</td>
       </tr>
       <tr>
         <td><a href="https://wg21.link/p2113r0">P2113R0</a></td>