Keyword Test - FindAll Method

Here's the method

https://support.smartbear.com/testcomplete/docs/reference/test-objects/members/common-for-all/findall-method.html

You can use Run Code Snippet to use it in a keyword test. As this suggests, use Set Variable Value to set up the variables you need and then use Run Code Snippet for the actual FindAll.

https://support.smartbear.com/testcomplete/docs/keyword-testing/reference/test-actions/run-code-snippet.html