magento2.3 – Configuring Magento 2.3 MSI (Multi Source Inventory) with Multiple Stocks

I am trying to configure Magento MSI with Multiple Stock for a single Sales Channel but it only allows me to assign single stock to a sales channel. Based on Magento’s documentation, this is how it is expected to work. Is there a way I can modify this behavior to have multiple stocks assigned to a single sales channel?

Below is my scenario. I have three Vendors and each has its own warehouse. At a time, it only allows assigning Sales Channel to just one stock which is below screenshot is Vendor 1.

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Thanks for your help!