When accessing the airgap bundle download portal you only see a certain number of releases and there's no visible button or option to show the old releases.
The page shows the latest updates in order to encourage the customer to keep their installation updated with the latest versions.
To show the older releases, just add
?show=all at the end of the download URL in the download portal
This is how the regular URL looks like and it shows a limited number of airgap bundles releases.
To see the entire list add
?show=all at the end