If you and your team are moving from Jira Server/DC to Jira Cloud, there are several points you should be aware of.
There are some feature differences
Configuration won't be migrated automatically by the Migration path Atlassian provides
For the core part of Excel-like Issue Editor for Jira, the user-facing features are similar between the different hosting versions. However, some features are different. We recommend you test the needed functions in your testing environment.
Change issue status
Edit Sprint field
Create issue from context menu
Drag and drop
WBS Gantt-Chart hierarchy support
Verify that all the needed features exist on Jira Cloud
Check the Supported platforms
Install Excel-like Issue Editor for Jira on your Jira Cloud instance
Manually set the Date/Time Configuration
Manually set the Permissions if required
If you have any questions, please feel free to contact our support team.