Hi,

Please refer to the code:

from odoo import fields, models, api

class SaleOrderLine(models.Model):

    _inherit = 'sale.order.line'

    warehouse_id = fields.Many2one(

        'stock.warehouse',

        string='Warehouse',

        help='Warehouse to issue this product from. Overrides the order warehouse if set.'

    )

    @api.onchange('warehouse_id')

    def _onchange_warehouse_id(self):

        if self.warehouse_id:

            self.warehouse_id = self.warehouse_id

    def _prepare_procurement_values(self, group_id=False):

        """Override to inject custom warehouse in procurement."""

        vals = super()._prepare_procurement_values(group_id)

        if self.warehouse_id:

            vals['warehouse_id'] = self.warehouse_id

            vals['location_id'] = self.warehouse_id.lot_stock_id.id

        return vals

Each sale line can define its own warehouse.

When confirming the order, Odoo will generate separate deliveries per warehouse (automatically handled via procurement groups).

Hope it helps.

Hello Kenan,
Odoo also provides warehouse configuration at the Sales Order Line level. You just need to confirm which warehouse is being used when the delivery order is created. and you can't set the warehouse at the invoice level because the warehouse operations already done in backend, so it’s no longer relevant to the Accounting layer. 

Hope it information helps, Thanks.