I want to send an email notification to the user's team leader when they are added to a lead. In the create method,

@api.model
    def create(self, vals):
        record = super().create(vals)

        body = self.env['ir.qweb']._render('mail.message_user_assigned', {'object': record})
        record.message_notify(
            subject=f"New Opportunity {record.name} Assigned to {record.user_id.name}",
            body=body,
            partner_ids=[record.team_id.user_id.partner_id.id],  # recipients
            email_layout_xmlid='mail.mail_notification_layout', 
            record_name=record.name,  # optional: visible in chatter
            model_description = self.env['ir.model']._get(record._name).display_name,
        )

        return record

the following code sends an email to the team leader. However, the below code in the write method doesn't send an email.

def write(self, vals):
	
	​res = super().write(vals)

        if 'team_id' in vals:
            for record in self:                    
                # Add the team's user_id's email if it's different from the creator
                if record.team_id.user_id and (record.create_uid.id != record.team_id.user_id.id):
                    partner_id = record.team_id.user_id.partner_id

                if not partner_id:
                    continue
                if partner_id.id not in record.message_follower_ids.mapped('partner_id').ids:
                    record.message_subscribe(partner_ids=[partner_id.id])

                # Render the QWeb template
                body = self.env['ir.qweb']._render('mail.message_user_assigned', {'object': record})

                # Send notification
                record.message_notify(
                    subject=f"Opportunity {record.name} assigned to {record.user_id.name}",
                    body=body, partner_ids=[partner_id.id],
                    email_layout_xmlid='mail.mail_notification_layout',
                    record_name=record.name,
                    model_description=self.env['ir.model']._get(record._name).display_name,
                )
        return res

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