Hi
When trying to do a test run of a single space from our confluence data center instance to a cloud instance, no spaces show as being available to migrate from our data center instance after in our cloud instance going to setup > selecting source > selecting method (Migrate spaces and Marketplace Apps) > Select spaces to migrate. It just looks like the below screenshot.
Our datacenter instance is version 10.2.19 and our Confluence Cloud Migration Assistant is version 3.14.3