When I tried to install Asana importer plugin the system returns: https://marketplace.atlassian.com/plugins/com.atlassian.jira.plugins.jira-importers-asana-plugin/ cannot be installed on this Cloud instance.
Unfortunately Atlassian recently removed support for most third party issue tracker importers in JIRA Cloud, see Importing data from Asana:
"The Asana importer is no longer supported by Atlassian, but you can still import data with a CSV file. Check out the Atlassian Community to find tips and tricks from other users who've done it successfully."
While add-ons often use a single Marketplace listing for their Cloud and Server version, both hosting options require very different technologies - the supported target platforms will be visible in the top right tab, and the Asana Importer Plugin for JIRA indeed only claims JIRA Server support meanwhile, i.e. the Cloud 'hosting option is not available for this add-on':
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