macOS (Catalina) Disabled Input Monitoring

I have an application that I need to add to the input monitoring section of Security/Privacy. For some reason when I click on it and then unlock I don't even get an empty list, I get nothing and there's no more "+" to add to the list....

Solution 1:

Can't speak specifically for that list as I'm still on Mojave, but there are several like that [Microphone & Camera on Mojave]. The app must ask, there is no user 'add' function at all.

That is the empty list, it won't become a true list until it is populated.

Solution 2:

I ran into this with Logitech Options. It wasn't showing up in Input Monitoring. To fix this, I had to see where else it was and remove it. Then reboot.

In my case, I found Logi Options and Logi Options Daemon in Accessibility.

1. Click the lock icon
2. Enter admin password
3. Select the app to remove
4. Click the minus sign (-) button
5. Repeat for other related apps
6. Reboot

Now, when you log back into macOS, you will be prompted to allow the new permissions. This should add the app to Input Monitoring.