In your model's Python file, set the _order attribute to 'id desc' as shown below:

from odoo import models, fields 
class YourModel(models.Model): 
 _name = 'your.model' 
 _description = 'Your Model Description' 
 _order = 'id desc'

Alternative: Use the create_date Field:
_order = 'create_date desc'

Note: The _order attribute sets the default sorting for all views associated with the model. If you need different sorting orders for different views, you can specify the default_order attribute directly in the view's XML definition. 

For example:

<tree default_order="create_date desc, id desc">

    <!-- Field definitions -->

</tree>

Best Regards,

NIZAMUDHEEN MJ
Accurates

Hi

add in your model python file add _order attribute

_order = 'create_date desc'

example,

Its working file and newly created record first

Thanks