For default aircraft, it's possible that the model does not include a pilot in the external view. This can vary between different aircraft models. If you are using third-party add-ons, they might not be fully compatible with the latest version of the simulator. Ensure that all your add-ons are updated to their latest versions.
Sometimes, certain graphics settings can affect the visibility of cockpit elements. Try adjusting your graphics settings to see if it resolves the issue.