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, theuser-facing features are similar between the different hosting versions. However, some features are different. We recommend you to test the needed functions in your testing environment.