doc(mobile,features) : add that mobile overlay isn't supported yet

As of EOSSDK 1.16.4 overlay on mobile is not supported yet.
That includes Social Overlay and Store Overlay

Author: arthur740212

.github/README.md

@@ -53,7 +53,7 @@ There are many EOS features that do not require your player to have an Epic Game
 |[Authentication](https://dev.epicgames.com/docs/epic-account-services/auth-interface)     | ✅ | ["Auth & Friends"](/com.playeveryware.eos/Documentation~/scene_walkthrough/auth&friends_walkthrough.md), [Information](/com.playeveryware.eos/Documentation~/player_authentication.md) | ✔️ |
 |[Custom Invites](https://dev.epicgames.com/docs/game-services/custom-invites-interface)   | ✅ | ["Custom Invites"](/com.playeveryware.eos/Documentation~/scene_walkthrough/customInvites_walkthrough.md)                                               |  |
 |[Connect Interface](https://dev.epicgames.com/docs/game-services/eos-connect-interface)   | ✅ | ["Auth & Friends"](/com.playeveryware.eos/Documentation~/scene_walkthrough/auth&friends_walkthrough.md)                                                               |   |
-|[Ecommerce](https://dev.epicgames.com/docs/epic-games-store/tech-features-config/ecom)    | ✅ | ["Store"](/com.playeveryware.eos/Documentation~/scene_walkthrough/store_walkthrough.md), [Information](/com.playeveryware.eos/Documentation~/ecom.md)                                        | ✔️ |
+|[Ecommerce](https://dev.epicgames.com/docs/epic-games-store/tech-features-config/ecom)[^2]    | ✅ | ["Store"](/com.playeveryware.eos/Documentation~/scene_walkthrough/store_walkthrough.md), [Information](/com.playeveryware.eos/Documentation~/ecom.md)                                        | ✔️ |
 |[Friends](https://dev.epicgames.com/docs/epic-account-services/eos-friends-interface)     | ✅ | ["Auth & Friends"](/com.playeveryware.eos/Documentation~/scene_walkthrough/auth&friends_walkthrough.md)                                                               | ✔️ |
 |[Leaderboards](https://dev.epicgames.com/docs/game-services/leaderboards)                 | ✅ | ["Leaderboards"](/com.playeveryware.eos/Documentation~/scene_walkthrough/leaderboards_walkthrough.md)                                                               |   |
 |[Lobby](https://dev.epicgames.com/docs/game-services/lobbies)                             | ✅ | ["Lobbies"](/com.playeveryware.eos/Documentation~/scene_walkthrough/lobbies_walkthrough.md)                                                                    |  |
@@ -69,14 +69,16 @@ There are many EOS features that do not require your player to have an Epic Game
 |[Reports](https://dev.epicgames.com/docs/game-services/reports-interface)                 | ✅ | ["Player Reports & Sanctions"](/com.playeveryware.eos/Documentation~/scene_walkthrough/player_reports_and_sanctions_walkthrough.md)                                               |  |
 |[Sanctions](https://dev.epicgames.com/docs/game-services/sanctions-interface)             | ✅ | ["Player Reports & Sanctions"](/com.playeveryware.eos/Documentation~/scene_walkthrough/player_reports_and_sanctions_walkthrough.md)                                               |  |
 |[Sessions](https://dev.epicgames.com/docs/game-services/sessions)                         | ✅ | ["Sessions & Matchmaking"](/com.playeveryware.eos/Documentation~/scene_walkthrough/sessions_and_matchmaking_walkthrough.md)                                                   |  |
-|[Social Overlay](https://dev.epicgames.com/docs/epic-account-services/social-overlay-overview) / [UI Interface](https://dev.epicgames.com/docs/epic-account-services/eosui-interface) | ✅ | [Information](/com.playeveryware.eos/Documentation~/overlay.md)        | ✔️ |
+|[Social Overlay](https://dev.epicgames.com/docs/epic-account-services/social-overlay-overview)[^2] / [UI Interface](https://dev.epicgames.com/docs/epic-account-services/eosui-interface) | ✅ | [Information](/com.playeveryware.eos/Documentation~/overlay.md)        | ✔️ |
 |[Stats](https://dev.epicgames.com/docs/game-services/eos-stats-interface)                 | ✅ | ["Leaderboards"](/com.playeveryware.eos/Documentation~/scene_walkthrough/leaderboards_walkthrough.md)                                                               |  |
 |[Title Storage](https://dev.epicgames.com/docs/game-services/title-storage)               | ✅ | ["Title Storage"](/com.playeveryware.eos/Documentation~/scene_walkthrough/title_storage_walkthrough.md)                                                              |  |
 |[User Info Interface](https://dev.epicgames.com/docs/epic-account-services/eos-user-info-interface) | ✅ | NA                                                                                                                     | ✔️ |
 |[Voice Trusted Server](https://dev.epicgames.com/docs/game-services/voice#voicewithatrustedserverapplication) | ❌ | NA                                                                                                           |  |
 
 Efforts will be made to add corresponding support to features as they are added to the Epic Online Services SDK. The table above reflects the features as of November 2023.
 
+[^2]: Overlay Features aren't supported yet on Mobile devices as of EOSSDK 1.16.4. That includes Social Overlay and Store Overlay.
+
 ## Supported Platforms
 
 We currently support the following platforms, details of each can be found on our [Supported Platforms](/com.playeveryware.eos/Documentation~/supported_platforms.md) document: