The answer is highly likely to be no.
From https://www.atlassian.com/trust/security/security-practices, you can see they are ISO27001, SOC2 and PCI DSS certified, but not FedRAMP.
Any customer who is sensitive about their information probably should be using Server anyway.
Anyway, to be sure, you can raise a ticket at https://support.atlassian.com/
@Dave Kendighttps://www.contegix.com/products-and-services/application-management/atlassian-jira/ is the only option I've found for FedRAMP approved providers. Confluence as well. They are not exactly cheap though.
We have work in progress to achieve FedRAMP ATOs for Jira and Confluence Cloud, please check the estimated timelines for this and other regulation frameworks in our Roadmap: https://www.atlassian.com/roadmap/cloud?category=compliance&selectedProduct=cloud
(BTW: Trello recently received an ATO for FedRAMP Tailored, in case that is of interest)
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