Hi @Anish3 ,
Did you complete the setup process as mentioned above, or did an error occur when you tried to activate your PayPal account within Shopify? Does the gateway show as activated in Settings > Payment providers?
Please provide as much information as you can about the issues you’re experiencing and what you’re seeing in the Shopify admin and I will do my best to help you.
Kind regards,
Victor | Shopify Social Care