There are certain pages that do not have the Cloud version when you select it, although the feature is available and functional on Cloud.

Here they are:
Filter Results Gadget - https://confluence.atlassian.com/jira064/adding-the-filter-results-gadget-720416922.html
Two-dimensional fiter statistics gadget - https://confluence.atlassian.com/jira064/adding-the-two-dimensional-filter-statistics-gadget-720416991.html
Defining resolution field values - https://confluence.atlassian.com/adminjiraserver073/defining-resolution-field-values-861253253.html