You'd create one form, not two, and hide the things that you don't want the sender to see and unhide them for the reviewer. That would be accomplished in pretty much the same way as if you were hiding forms/reports.
tblReviews would need an 'approved' field, which I would make a date/time field. Null means no, a date (and time if desired) means yes. Yes/No T/F doesn't tell you much. I suggest that you create your tables, set the relationships then post a pic of the relationships window before putting any data in tables.
Access security can keep most people from seeing what they shouldn't so you'll probably be OK with that.
The more we hear silence, the more we begin to think about our value in this universe.
Paraphrase of Professor Brian Cox.