What is your domain name and What is your business name? I think that you have registered a domain name that does not match your business name. There are 2 solutions for you:
1. Change your business name to match your domain. In case you do not know how to, here is the guide: How to Change Shopify Store Name in 2020.
2. Register another domain name then change your Shopify domain name to match your business name.
Hope it helps!