No. Shopify doesn’t allow apps to add fees to the same section where taxes and shipping appear at checkout. Shopify imposes restrictions that prevent fees or other custom charges from being integrated into the standard sections like Subtotal or Shipping. Instead, these fees must be presented as separate line items to comply with the platform's policies.
Because of that, fees created with our app are added as products instead.
If Shopify ever allows a more integrated way to show fees, we’ll add support for it.