We need to add the same product variant (representing a Product Protection Plan, e.g., variantId=1234) to the Shopify POS cart multiple times, with each instance appearing as a separate line item. This is because each protection plan instance needs to be associated with a different primary product (…

Hey everyone – Thanks for sharing your feedback around supporting multiple cart line items with the same variant ID combined with unique customizations via line_item_properties (similar to how it’s available on the online store). You’re right; this isn’t available right now in Shopify POS. Our engi…

Does this work in Admin API? :thinking: It seems a bit like abusing the cart as its designed to be one line item per variant. Could you work the other way around, like so Line Item 1: Product A (variantId=productA_variant, customProperties: PROTECTED + other info) Line Item 2: Product B (variant…

Yeah we are actively looking into alternative options but the way our BE is setup it would be ideal if we could add these Product Protection Plans as separate lines items. But sounds like there isn’t a way to do this given that the CART was designed to be one line item per variant id?

Yeah the cart in Shopify is designed to have one line item per variant id. I know you can work around it via the Admin API but POS Cart won’t let you do this.

Ok thanks for the help! Think we are exploring workarounds @JordanFinners how would this work with the Admin API? Also is this something that might potentially get updated by Shopify dev to where you can add multiple line items per variantId?

@JordanFinners Are you aware of any open issues/features that Shopify is looking into? The fact that this operates differently from the storefront poses some challenges, and we’re trying to evaluate how to proceed.

I think you can bodge it with the order create (or you certainly used to) orderCreate - GraphQL Admin You’d need to give it a try. I don’t know of anything where this would change. TBH I would look at changing your data model around to marry up with one line item to one product variant as that how…

This is so very much needed. It works as expected in the online store, but the disparity in POS is causing major issues for us too. I’ve been talking with @JS_Goupil about this and sent in screen recordings, but I’m not sure if it’s been worked on or what the status is. There was some indication tha…

@Brian_Edwards just adding to the choir. Having the same issue with some of my clients. I understand you all are pushing POS hard but I have to halt my POS referral efforts until we can get this resolved. After uncovering this later in dev (while banking on a similar ecomm experience) I’m a little s…

Hi @D2C-Dev Does this update improve the experience: [image] Line Item not distinct with line item properties Extensions Hi @D2C-Dev I noticed there was an update in the recent Winter Edition that might improve this experience, from our docs : If you have a…

Hi all, I just posted this same answer on this post . I’ve been experimenting with this and I believe splitting line items that have different properties is definitely possible in POS now. Here is how I managed to get it working. Method 1: Sequential Adding You can combine addLineItem with addLin…

UI-Extensions POS Cart API: Add multiple line items with same variantId

Extensions

Liam-Shopify January 9, 2026, 11:56am 11

Hi @D2C-Dev

Does this update improve the experience:

Topic		Replies	Views
Line Item not distinct with line item properties Extensions pos-extensions	7	280	January 13, 2026
POS Cart merges line items with same variant ID, discarding distinct line item properties (regression) Extensions pos-extensions	2	122	March 11, 2026
Feature request: updateLineItemQuantity in the POS UI Extensions Cart AP Extensions pos-extensions	2	75	September 2, 2026
Selected Product Variant not displayed in Cart Extensions pos-extensions	20	466	August 26, 2026
Shopify POS UI Extension: `shopify.cart.addLineItem` Performance Bottleneck Extensions pos-extensions	19	610	July 16, 2026

UI-Extensions POS Cart API: Add multiple line items with same variantId

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