To see the newest posts on Facebook, follow these steps:
Open the Facebook app or website on your device.
Scroll to the top of your News Feed, which is the default landing page for most Facebook users.
Look for the "Sort" option, which is located at the top right of the News Feed on the app and at the top left on the website.
Click or tap on "Sort," and you'll see a menu with different sorting options.
Select "Most Recent" from the list of options.
Your News Feed will now show you the most recent posts, with the newest posts at the top.
If you want to go back to the default sorting option, you can go back to the "Sort" menu and select "Top Stories" instead of "Most Recent."
Note that Facebook's algorithms may not always show you every post from your friends and pages in your News Feed, even if you have selected "Most Recent." If you want to make sure you don't miss any posts from specific friends or pages, you can adjust your notifications settings for those profiles.