Note: The Seller Central calls on "restricted or requiring approval" are not considered banned, from the business point of view, and some of the products are still going through without restrictions therefore all the listings must be treated as active listings.
The action of banning/unbanning a brand will lead to the removal of the brand inventory of the listings associated with the chosen sales channel.
Click on the " Settings" icon

Click on Sales Channels

Click on " Show More Information" under the selected sales channel you need to make the changes

Click on " Banned Brands"

Check the Brands to be banned

Click the " Update" button
No further action is required.
Based on the Seller's Market, it could take up to an hour to update the market.
NOTE: To publish back the inventory, uncheck the brand and click Update.