Hello, I wish for transient model to appear once field changes, however I cannot figure out what should I do so it would appear once code is triggered. I manage to make it appear on menu option so I suppose xml and wizard class are working fine.
splitting_wizard.py:

class SplittingWizard(models.TransientModel): 
    _name = "splitting.wizard"

    _description = "This wizards show splitting selection"    

    options = fields.Selection([('x4','x4 (4,5 mm)'), ('x5', 'x5 (3,8 mm)'), ('x6', "x6 (2.5 mm)")],                         string = "Kalibruotas lentos vienetas skaldomas")

    def action_send(self):

        logging.info(f"veik")```

splitting_wizard_view.xml:

<recordid="splitting_wizard_action"model="ir.actions.act_window">       

 <fieldname="name">Splitting Wizardddfield>       

 <fieldname="type">ir.actions.act_windowfield>       

 <fieldname="res_model">splitting.wizardfield>        

<fieldname="view_mode">formfield>        

<fieldname="target">newfield>    

record> ​

code attempting to call window in stock_picking.py:

 @api.onchange('picking_type_id')

    def_get_splitting_popup(self):

        operation_type_transfer_to_splitting = self.env.ref("ecowood_splitting.operation_type_transfer_to_splitting")

        ifself.picking_type_id == operation_type_transfer_to_splitting:

            action = self.env.ref('ecowood_splitting.splitting_wizard_action')

            result = action.sudo().read()[0]

            result['context'] = {'default_options' : "", }

            return {

                "name" : "Skaldymo langas",

                "type": "splitting_wizard_action",

                "res_model": "splitting.wizard",

                "view_mode":  "form",

                "target": "new",

            }