No, you don’t necessarily need a business PayPal account to sell on Shopify, but having one is highly recommended.

Shopify automatically creates a PayPal Express Checkout integration with your account. If you\’re using PayPal to process payments, a business PayPal account is ideal because it allows you to handle transactions professionally, issue invoices, and manage customer disputes effectively.

If you don’t want to use PayPal, you can set up other payment gateways like Stripe, Shopify Payments, or local providers to accept payments.

We recommend using a business PayPal account (since most functions and tools provided by PayPal for business owners are only available when using a business account), but you are free to use a personal account to receive PayPal payments.

Here’s our latest research to read; follow our blog to keep yourself updated.
https://businessglobalizer.com/blog/category/payment-gateways/

You Can Choose your e-commerce Plan with Business Globalizer That Suits You Best Based on Your Business Requirements and Models.
https://businessglobalizer.com/services/us-ecommerce-business-registration/