There is likely one of two reasons you are not getting new emojis, the first is that your device can no longer be updated. Emojis are often tied to updates, so if your phone or tablet can no longer run the latest version of Android, you'll need to upgrade to get the latest software.
They came with android 13 unfortunately. You could always try a different keyboard, Google keyboard or SwiftKey. They may have newer emojis you don't have with the Samsung keyboard.