How to find the possible values for CucumberOptions (plugin = ...)

I found another similarly titled question here, 42878832, but it didn't answer my question.

I am running Cucumber and would like to customise my TestRunner by specifying CucumberOptions. I am trying to add values to the plugin option and am following an example where it's specified a value of progress as one of the allowed values. When I run my code I don't see it producing the expected output .P- so am thinking that perhaps the version I am using today doesn't support this feature anymore. I am using Intellij (2020.2), Java (15), cucumber-java (6.8.1).

Does anyone know where the options are documented and more specifically where can I read the list of available options for the plugin option. I found this page CucumberOptions docs on the Cucumber site but it wasn't very helpful.

My TestRunner class looks like below.

@RunWith(Cucumber.class) @CucumberOptions(
        features = {"cucumber/features"},
        glue = {"steps"},
        plugin = {"progress", "pretty", "html:Report1"},
        dryRun = false,
        monochrome = true
        //tags = {"@P1"}
        //name = {"Logo"}
        ) public class TestRunner { }