On macOS Monterey, after dragging the 'Display' section of Control Center out into its own menu extra:
from talon import Module, actions, ui
from pprint import pprint as pp
mod = Module()
@mod.action_class
class Actions:
def test():
"""test"""
s = ui.apps(bundle='com.apple.controlcenter')[0]
dm = s.children.find_one(AXRole='AXMenuBarItem', AXIdentifier='com.apple.menuextra.display')
dm.perform('AXPress')
actions.sleep(0.1)
pp(s.children[0].children)
pp(s.children[0].AXChildren)
dm.perform('AXPress')
>>> actions.user.test()
[]
[<AXScrollArea>, <AXButton 'Display Preferences…'>]