As you've discovered, you can't place portals within portals.
"I want to put a portal to Product_Status (only one line) into the line of the other portal."
Only one line? Then you are only pulling data from one record or each record in your portal. Just place the fields you want from Product_Status directly into the portal. Your relationship's sort settings will determine which of possibly many related records will supply the data you get.
BTW, you can simulate a sub summary report in IWP if you create a report table, copy the records you want into this table (or at least their ID fields) and then insert dummy records configured to function and sort as the sub-summary parts. This can take a lot of work, but it is possible.