Jetways won't appear if you don't have GSX installed. Which of course is completely free to use at all our airports.
If you have it already, be sure you don't have a GSX custom profile you might have made in the past for KFLL, which is taking priority over our updated GSX profile which now contains jetways. You can check this by looking the GSX airport customization page for KFLL, it will tell you in the top row the name of any eventual user-made customization file for GSX ( located in %APPDATA%\Virtuali\GSX ), which you need to remove, so our file can take over.
Of course, after you removed your old custom GSX profile, you can still customize it, because it will now based on the jetway-enabled version we now supply with the scenery.