It is not possible but we do have a feature request to be able to build a Roadmap Planner from an external source, which I believe would meet your requirements:
Please vote on the request and watch it on order to be updated of any changes.
There might be a few alternatives out there for you, if you want to build a roadmap but not be limited to the features in our Roadmap Macro. For example, there's a company called ProductPlan, and they appear to have a way to embed their roadmap within Confluence as well:
I can't confirm if their roadmap feature has a way to generate a roadmap from an Excel file, but it might be worth the look.
I attended Atlassian Summit 2019 and learned a lot from the presenters, attendees and knowledgeable Atlassian product managers. The presentations I attended focused on applying Agile, pla...
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