How to install the Splunk App for AWS on Splunk Cloud trial instance

[caulis]

I'd like to install the Splunk App for AWS in my free Splunk Cloud trial instance.

I've tried to search the Splunk App for AWS on "Browse more apps.". I followed the following document.
https://docs.splunk.com/Documentation/AWS/5.2.0/Installation/Installoncloud#Install_on_managed_Splun...

But the search result didn't have it.
Could you tell me what should I do?