### Describe the bug The 'Enter/Exit FullScreen' icon button is unnecessarily displayed in responsive mode for the Object Page Component ### Isolated Example _No response_ ### Reproduction steps 1. Go to the storybook for https://ui5.sap.com/#/entity/sap.uxap.ObjectPageLayout/sample/sap.uxap.sample.ObjectPageBeforeNavigate 2. Using Chrome dev tools, toggle the device toolbar -> check the page & associated dialogs at 320px viewport width 3. Refresh the page after switching to get the responsive width view 4. Observed that the 'Enter/Exit Full Screen' icon button is displayed in responsive mode, but it serves no functional purpose. ### Expected Behaviour Remove the 'Enter/Exit Full Screen' icon button from responsive mode since it serves no functional purpose. ### Screenshots or Videos <img width="275" height="457" alt="Image" src="https://github.com/user-attachments/assets/0cf107d6-ab37-407f-9637-a443f7209c9c" /> ### UI5 Web Components for React Version 2.12.0 ### UI5 Web Components Version 2.12 ### Browser Chrome ### Operating System _No response_ ### Additional Context _No response_ ### Relevant log output ```shell ``` ### Organization _No response_ ### Declaration - [x] I’m not disclosing any internal or sensitive information.