The admin can hide seller information from the product page and the sell page. There is a feature in Marketplace configuration by which the admin can enable/disable the seller information from the product page.
Show or hide seller information from Sell Page:
The admin can disable seller information from the sell page by navigating: Extensions=>Modules=>Edit Marketplace=>Sell=>Show Sellers=>Disable
Show or hide seller information from the product page:
To show the seller information on the product page, the admin can add the layout at product layout by navigating Design=>Layouts=>Product=>Add new layout=>Select Marketplace and click on save.
Please do contact us for any further queries or requirements. You can also check our Opencart extensions for additional features.