Why does a Simulink Test generated report not display all the tests under the Verify Result section?

This is a limitation in R2019a, and has been resolved in R2019b. If you have access to a newer release, generating the report in the new version should produce a list of tests under the Verify Result section that can span multiple pages.

Alternatively, you can try using the MATLAB Unit Test Framework to generate an alternative report and see if the tables are formatted better for them. To do so, you will need to do the following in MATLAB:

>> suite = testsuite();
>> testRunner = matlab.unittest.TestRunner.withTextOutput; % or "withNoPlugins"
>> testRunner.addPlugin(sltest.plugins.TestManagerResultsPlugin);
>> testRunner.addPlugin(matlab.unittest.plugins.TestReportPlugin.producingPDF());
>> testRunner.run(suite); % this will run the test and generate a report