The role Learner in System can mean it is either the default role or a system level role. It shows up the same. See my screenshot of how this looks in standard Moodle with the Authenticated user as default role.
So, you can not know from this report whether the role is the default or another system level role.
So, you can not know from this report whether the role is the default or another system level role.
You will know that because the default role is set in the User policies > Default role and also that this role does not need to have the System set in its contexts in the role definition, while an assignable System level role must have System set as its context. (As you can see in the second screenshot.)
