have this issue, https://discussions.apple.com/thread/250066606
all the apps have disappeared from the accessibility list after installing the last 10.15.6 supplemental update.
can't add apps to the list.
Deleting tcc.db hasn't solved the issue
MacBook Pro 16″, macOS 10.15
If you are unlocking your system preferences padlock in the bottom left hand corner, and it still isn't working, it sounds like your profile is corrupted, or you have some security software preventing you from using those items, or those items are not fully Catalina tested. Use Etrecheck to help isolate issues:
issue persists when booting in safe mode
if system integrity protection is disabled, everything works, if it's enabled, nothing works...
You may need to reinstall the program. It should push its Accessibility plugins upon installation, and ask you to open System Preferences to do so.
Testing to reset services individually, some of them success, while other fail...
➜ ~ /usr/bin/tccutil reset Accessibility
tccutil: Failed to reset Accessibility
➜ ~ /usr/bin/tccutil reset AddressBook
Successfully reset AddressBook
➜ ~ /usr/bin/tccutil reset ScreenCapture
tccutil: Failed to reset ScreenCapture
➜ ~ /usr/bin/tccutil reset SpeechRecognition
Successfully reset SpeechRecognition
it doesn't work with any app on the system, and it doesn't work with any new app either
Yes, that is exactly what is not working properly
screen sharing permissions for google chrome have been disabled too, can't add them back
also can't use screen sharing in any app
Tcc util command fails, usually works...
➜ ~ tccutil reset All
tccutil: Failed to reset All
https://eclecticlight.co/2020/01/28/a-guide-to-catalinas-privacy-protection-4-tccutil/
Can't add app to accessibility permissions
