and sales that are created from that cart should be attributed to that sales channel. No matter what I pass in, the sales are still getting attributed to "Online Store" (as seen on the order page in my shop's admin dashboard).
Did something change on how to do sales attribution? I'm fairly confident that this has worked for me in the past. To deeper test, I tried creating a discount code that was *not* synced to the sales channel whose storefront access token I'm passing in, and the checkout still accepts the discount code. So it seems that this `access_token` parameter is being ignored.