Hi,

You can do this by using a boolean field.

Python

class className(models.Model):
   _name = "model name"
   test = fields.Boolean(string="Test", default=False)
   
   def button_action(self):
      self.test = True
      .....
      Your code
      .....

Here test is the boolean field and it is set to False by default.Inside the button clicking function it is set to True.

XML

< record id="..." model="" rel="ugc">ir.ui.view">
     < field name="name">name
     < field name="model">model name
     < field name="arch" type="xml">
        < form>
          < header>
             < button string="Button Name" attrs="{'invisible': ['&', ('approved', '=', False), ('available', '=', True)]}  class="oe_highlight" name="button_action" type="object"/>
          < sheet>
            .......
            more code
            .......            < notebook attrs="{'invisible': [('test', '=', False)]}">
               < page string="Page name">
                   ............
                   more code
                   ............
               < /page>
            < /notebook>
          < /sheet>
        < /form>
     < /record>

Here condition checked for displaying the page,that is it will shown only when the test boolean field is True(This condition will set upon button click),otherwise it will be invisible.

Regards