Unlabeled buttons are bad for accessibility, see missing label:

https://cs.chromium.org/chromium/src/chrome/browser/resources/settings/android_apps_page/android_settings_element.html?rcl=f299db8a1ba43b920eb43d813fbdfdcbf32f47d4&l=20

Please add an automated test when fixing issue to prevent regressions. See:
https://www.chromium.org/developers/accessibility/testing/axe-core