There are a few steps you can take to try and resolve this issue:
1. First, ensure that you have correctly uploaded the favicon to your WordPress site and that it is accessible at the URL specified in the Site Identity settings. You can verify this by visiting the URL of your favicon in a web browser.
2. Next, try clearing your browser cache and cookies. This can often fix issues with favicons not displaying correctly.
3. Additionally, make sure that your theme is properly including the favicon in the head section of the HTML code. You can check this by viewing the source code of your website in your browser and searching for the favicon link. If it is not present, you may need to add it manually by editing your theme’s header.php file.
4. If you are using a caching plugin, try clearing the cache to see if that resolves the issue.
5. Finally, if none of the above steps help, you may need to disable any plugins that you are using and see if that resolves the issue. If it does, you can try re-enabling your plugins one by one to determine which plugin is causing the issue.
I hope these suggestions help! If you have any other questions, please don’t hesitate to reach out.