Can I update my old Shopify theme without losing customer information?

Store Design
1

hi
I have an old theme in Shopify
I want to renew the theme and get a wholesale system

Can I do this so that I do not lose customer information in the old theme?

2

Greetings @khaled13 ,
Hope you are doing great
We can help you renew the theme and get a wholesale system without losing the customer data.
You can mail us at apps@cedcommerce.com.