Are you looking for a solution to allow seller create their own subdomain based on your domain marketplace? Instead of login marketplacedomain.com/seller, customers can get access directly to seller.marketplacedomain.com to view & purchase seller product at ease. Our Magento 2 Vendor Subdomain - Landofcoder will help you do as well. Quickly Detect & Auto Approve URL Link will let vendor create their subdomain amazingly.
This is a plugin of Magento 2 Marketplace Extension. To use this module smoothly, you must install Magento 2 Marketplace Module first.