This was most likely from the import. You may want to check the reserved_qty in stock_quant table. I've noticed that if I have a product already reserved and then do a manual on hand qty adjustment the free to use qty is always off until those reserved stock pickings get closed and the reserve_qty in stock_quant gets reset to 0.  I found the only way to fix it in this situation is to unreserve  all the reserved qty for that product using the forecasted repot and then I do a SQL query in pgAdmin to fix the real reserved qty 0. 

SELECT id, product_id, quantity, reserved_quantity

FROM public.stock_quant

Where product_id = 421582;

Replace 421582 with your product id #

Were you able to solve this problem. If so, please share the solution. 

Make sure to review the forecast report's data as they may offer some insight into which operation is potentially holding the quantity.

No multi-company, stock for this item was only entered once (initial inventory) in one location, no stock is reserved.

Do check the details on the forecast report, this could provide some insights on which operation might be reserving the qty.

There could be several reasons for not seeing a product available for sale in Odoo:

Multi-Company: If your organization has multiple business entities (companies) set up in Odoo, you might have stock in one company, but you're trying to place an order in another. Make sure you're selecting the right company when creating your sales order.

Multi-Warehouse/Locations: In a single business entity, you might have stock in different warehouse locations. Ensure that you've selected the correct warehouse when creating your sales order.

Reserved Stock: Check the forecast view of the product to see if any stock is reserved for sales or manufacturing orders. This can affect the availability of the product for new orders.

Thanks.