Why i can't export my community site?

[sherybedrock]

why the icon for export is missing?

[smacdonald2008]

When you want to export a site and all the AEM assets included in the site- make sure you setup the filters in the AEM Package properly. See: https://docs.adobe.com/docs/en/aem/6-2/administer/content/package-manager.html

In this topic - look at filters.