I'm tying to get the field "next number (number_next_actual)"  of a product sequence and auto set it everytime i create a new product, i need to autofill the field before saving the new product.

something like this picture

https://drive.google.com/file/d/1UviCXw-3nRBdjNygOvMuLAaCsWfgYOCO/view?usp=sharing

i have  coded this, it fill the sequence when i save the new product,  but i need to load the sequence when i press the button create

@api.model

    def create(self, values):

        values['ref_sequence'] = self.env['ir.sequence'].next_by_code('ref.seq')

        return super(ProductTemplate, self).create(values)

do someone have any idea of how to achieve this, if is there any similar in odoo, or any method i could use to get it.