Hi,

If you are creating new model using studio, you can enable the Archiving option from the suggestion box shown by odoo, see the image: https://ibb.co/ZW2j3Fk

If you forget to do this initially, you can go to settings -> technical -> database structure -> fields, and add a new field named x_active in your model of type boolean and then using the studio add this field to the form and then set the default value as True. Now you will have the Archive and Unarchive option available for the model.

To do this from code, see: https://www.youtube.com/watch?v=aSs0aKsbUqo

Thanks