In such a case, the dealer can confine or permit clients to involve a similar client account data for every one of the sites or the client needs to make one more record as he/she can not get to different sites with similar record qualifications.
Subsequently, to design client account scope means to share client account data to different sites or not.
The post shows the technique to Configure Customer Account Scope Magento 2.
For more info: https://meetanshi.com/blog/configure-customer-account-scope-in-magento-2/