This article provides a fix for stock status being incorrect after Inventory Management installation/upgrade.
After first installing or upgrading to have Inventory Management in the multi-website Adobe Commerce environment, not all websites have the correct stock statuses for products.
When you first install/upgrade, all of your products are assigned to the default source, associating all quantities to that source. The Default Source is assigned to the Default Stock, with the Default website associated.
If you have more than one website, you need to add these websites as Sales Channels to the Default Stock or other custom stocks.
See the Stock section of the wiki/user guide in our user guide for details on how to do this.