Show macOS Password in the menu bar

Troubleshooting

I couldn’t get Apple’s Passwords app to appear in my Mac’s menu bar.
In fact, even when I tried ticking the right option in the settings, nothing happened. Worse still, the tick mark wouldn’t stay there.

The solution involves resetting the interface layer of your Mac’s menu bar.

This is done in two steps:
1 - Grant Terminal permissions for full access to the Mac’s hard drive;
2 - Enter a line of code in Terminal to perform the reset.

Step 1:
macOS blocks Terminal by default. You need to grant it permissions:

System Settings → Privacy & Security → Full Disk Access
Click on + and add Terminal (or tick the green box)
Restart Terminal, then proceed to step 2.

Step 2:
Enter the following command in Terminal:
rm ~/Library/Group\ Containers/group.com.apple.controlcenter/Library/Preferences/group.com.apple.controlcenter.plist && killall ControlCenter

Result:
Open the Passwords app, go to Preferences and tick the box labelled ‘Show Passwords in the menu bar’.
Passwords now appears in the menu bar.