Restrict Product for Customer Group Magento 2 Extension
https://www.cynoinfotech.com/product/restrict-product-for-customer-group/
Restrict Product to Customer Group is a smart extension for Magento 2 that allows you to selectively restrict your products, categories and other pages from customer groups. Magento 2 Restrict Product for Customer Group helps admin to block specific categories, sub-categories and products for specific customer groups. Products and categories are only visible to certain selected customer groups. The store owner restricts specific products, categories and CMS pages to select customer groups.