The Entity Limit only applies to products, customers, orders and blog posts. Other supported data such as categories, taxes, reviews, etc., will be fully migrated during the migration process. To learn more about all supported data types, please refer to the Supported Entities section on the migration tool page.
If you want to migrate data from or to third-party modules/extensions, our VIP Support Service (Migration Customization) will assist you in fulfilling all your desired requests.