Dynamic form rules only fire when the record is open on that specific form. So your rule is saying, change when the checkbox goes from false to true. However, the part that is not stated but true is:
"Change when checkbox goes from false to true as long as I am in edit mode, looking at the record when the checkbox goes from false to true".
The box you are checking is on another form, so the dynamic form rule isnt firing. You either need to use a Pipeline, or can you make your Reviewed Checkbox a formula checkbox?
