Upon connecting a printer, it is automatically designated as the primary printer for printing receipts. If you have several printers, you can modify the primary printer within Shopify POS as given below.
Steps to modify the primary printer:
In Shopify POS, tap the ≡ symbol, followed by "Manage connected hardware."
In the "Receipt printers" section, select the printer you wish to designate as the primary.
Activate the "Primary receipt printer" option.
However, there are some disadvantages to using an external terminal. Firstly, you need to have an account with your terminal provider. Additionally, Shopify will only show the payment status of an order, but not any transaction details.