First of all, you guys must be clear that the downloads tab comes from the WP Travel Pro plugin. After you activate the WP Travel Pro plugin, an additional tab “Downloads” will be added in the tab section. But the tab will remain disabled.
So if you want to display the download tab at the front then make sure you have enabled that the download tab
If you have enabled the individual tab setting then go to individual trip tab setting and enable the tab.
If you have set the global tab setting then go to WP Travel > Settings > Tabs > Downloads to enable the section.
If you still can figure out the issue then kindly post your queries in our official support forum.