Here is the top-level documentation page for RHDG 8.5:
https://docs.redhat.com/en/documentation/red_hat_data_grid/8.5

Here is the top-level documentation page for RHDG 8.4:
https://docs.redhat.com/en/documentation/red_hat_data_grid/8.4

 The 8.5 page is missing links to the following pages:

• Supported Configurations
• Feature Support
• Component Details
• Deprecated Features and Functionality

These links should be included on the 8.5 Documentation page