Yes, it may help in this matter.

in xml code :

button name=" button_name" string="name to display" type="object"  class="oe_highlight"




in python  code :

def button_name(self):
    view_id = self.env.ref('external id').id
    context = self._context.copy()
    return {
        'name': 'form_name',
        'view_type': 'form',
        'view_mode': 'tree',
        'views': [(view_id, 'form')],
        'res_model': 'model id',
        'view_id': view_id,
        'type': 'ir.actions.act_window',
        'res_id': self.id,
        'target': 'new',
        'context': context,
    }

Hi,

Please refer to the following video link to add a button:

https://www.youtube.com/watch?v=N1GC4qIXFr4

Regards