It is possible to have multiple stores on the same Shopify account. However, there is a limit to the number of stores that you can manage with one account.
You can have up to five stores under one administrator account, with each store having its own unique domain. Each store can also be customized with its own tax settings, payment gateway, apps, and themes. The same customer profile, order history, customer lists and collections of products are shared between all stores.
If you’re looking to create and manage more than five stores on Shopify, you’ll need additional staff accounts, each with its own permissions depending on the task you want them to do.
To learn more about managing multiple stores on Shopify, you can check out their help page here: https://help.shopify.com/en/manual/your-account/manage-multiple-stores.