Updating the cart using shopify POS

Shopify Plus
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1

Hi I want to know how can we update the existing cart that is made on shopify POS in another tile of Shopify POS.

I want to know:

  1. how can we get the existing cart date into the POS tile we created.
  2. How can we update the cart in the custom tile eg. adding more products or removing products etc.
  3. How to place a check out for the cart from the custom tile created by us.

we are looking to have valid solution on this use case, also if you can provide any examples and documentations that would be great.

Thank you

2

Please check if this document can work for the requirement we have :

we are creating a web app and passing the link to the shopify tile so if there is any way to add update the existing cart option can the below given resource be helpful for what we are trying or there another to the web page to update an already existing cart using API or any other tool.

link: https://shopify.dev/docs/apps/tools/app-bridge/actions/cart#add-line-item