Password-Protect Apps MacOS Big Sur I need to block an app with a password for privacy, but I can't find this feature in Screentime.
It used to be in the old Parental controls in Mojave and earlier, but it seems to have been removed in more recent versions.

free apps preferred

Is there a 3rd party app to block apps with a password?
From a quick internet search, I found this article that lists two apps:

AppLocker is free to block one app, with a $10 purchase to unlock full functionality. Take this with a grain of salt, though - the average review is one star
AppCrypt is a one-time $30 payment (25% off with their coupon code). It looks like you can download it for free from their website, but likely has limited functionality