If you are looking to use Shopify Payments instead of Stripe, you will need to deactivate Stripe completely. Simply follow these steps:
From your admin panel, head to Settings > Payments
Locate the payment gateway Stripe > Manage
Then you can deactivate the gateway from that page
With that being said, can you let me know where you are located? Typically, if you currently have access to Stripe as a payment gateway, that means that Shopify Payment is not available. I can double check the availability in your country.
Holly | Social Care @ Shopify - Was my reply helpful? Click Like to let me know! - Was your question answered? Mark it as an Accepted Solution - To learn more visit the Shopify Help Center or the Shopify Blog