Hi, 

To display fields from different models on a new form view in Odoo, you can use related fields. Create a model with related fields that point to the fields you want to display. Here's an example:

from odoo import models, fields, api

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

    # Fields related to the Partner model
    partner_id = fields.Many2one('res.partner', string='Partner')
    partner_name = fields.Char(string='Partner Name', related='partner_id.name', readonly=True)

    # Fields related to the Product model
    product_id = fields.Many2one('product.product', string='Product')
    product_name = fields.Char(string='Product Name', related='product_id.name', readonly=True)

    # Fields related to the Sale Order model
    sale_order_id = fields.Many2one('sale.order', string='Sale Order')
    sale_order_date = fields.Date(string='Sale Order Date', related='sale_order_id.date_order', readonly=True)In this example, partner_name, product_name, and sale_order_date are related fields that fetch information from the res.partner, product.product, and sale.order models, respectively.

Now, you can create a new form view for this custom.model where you can display these related fields.

Hope it helps