Add bulk add SKU extension to Customer Account
Navigate to Shopify admin > Settings > Checkout, then choose Customize to open Checkout and Customer account editor

Go to the app section and select to add Quick order SKU extensions:

You can:
Create entirely new page for Quick order SKU (this full-page extension will be the main page where B2B clients place bulk SKUs order)

Add app Quick order SKU link block directly into Orders page (this extension will navigate buyers to the Quick order SKU full-page)

Finally, save settings to make the extension work on live store Customer Account

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