Hi,

Try the following code,

from odoo import models, fields

class CustomModel(models.Model):
    _name = 'custom.model'

    location_id = fields.Many2one('stock.location', string='Location', required=True)
   
    //define default function   
    def _get_product_domain(self):
        domain = [('qty_available', '>', 0)]
        if self.location_id:
            domain.append(('location_id', '=', self.location_id.id))
        return domain
   
    product_id = fields.Many2one('product.product', string='Product', domain=lambda self: self._get_product_domain())
   
   
    after applying this domain, if you need to add the search filter then  you can add the product_id in the filter 

Hope it helps