It appears that you are not qualifying for any activity on your test page. You will receive the Response token values in the 'Preview' section of the target call in developers tool. These can also be viewed through Experience Cloud Debugger.
However, the values will only appear for the mbox where the activity is getting delivered. Please ensure that you qualifying for an activity on this page and respective mbox. Hope that help.
That sounds working as expected to me. As mentioned response tokens would be delivered on the mboxes where Target activity is delivered.
In the case of redirect activities, the activity is actually delivered on the first page and not the page where the visitor is redirected to. Hope that helps. You may need to use 'preserve log' option in browser's developer tool to view the response tokens on the target call of first page. Hope that helps.