You can activate all payment methods (and their logos) from your Shopify account as shown below:

However, showing these icons beside our PayTabs logo is limited by exact numbers and orders that are managed ONLY from Shopify's side. 

Apple Pay icon/logo won't appear on the Shopify plugin during the checkout process.

PayTabs has no upper hand/access to modify the logo, yet Apple Pay will automatically show on the PayTabs Payment Page itself. 

To use Apple Pay, please ensure you are using an Apple device/Safari browser.