Here is a brief list of known data entity locations in the Control Panel available for BigCommerce stores for reference:
Design and Content Migration
Pages
Storefront > Web Pages
Widgets
Widget Templates
Coupon Codes
Marketing > Coupon Codes
Banners
Marketing > Banners
Abandoned Cart Email Templates
Marketing > Abandoned Cart Emails
Email Templates
Marketing > Transactional Emails
Blog Posts
Storefront > Blog
Active Theme
Storefront > Theme
Product Data Migration
Brands/Brand Metafields
Products > Brands
Categories/Category Metafields
Products > Product Categories
Products/Product Metafields
Products > View
Product Reviews
Products > Product Reviews
Price Lists
Products > Price Lists
Price List Assignments
Price List Records
Promotions
Marketing > Promotions
Order Data Migration
Orders
Orders > View
Gift Certificates
Orders > Gift Certificates
Customer Groups
Customers > Customer Groups
Customers/Customer Attributes
Customers > View