[2022] i dont have the international airport for some reason

The International Airport is part of the After Dark DLC, so make sure that's enabled. It's found in the Public Transport Hubs tab under Public Transport. It's one of the last tabs in the category.

Please try verifying game files through Steam. Here's how that's done:
https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

If that doesn't help, please make a report on our support forum so we can investigate what's up
https://forum.paradoxplaza.com/forum/forums/support-bug-reports.879/