Just like in android we have app called Applock, is there any app or built in feature in Windows 10? I found one called My Lockbox but its feature is limited in free version. So, is there any opensource or feature to lock unlimited apps?
Refer this !! You may find something
You can try a software named password door. I’ve used it for sometime. Works fine. (You can find the licence file searching google).
You can use Built-in Applocker in Windows to add Rules, follow this guide: https://docs.microsoft.com/en-us/windows/configuration/lock-down-windows-10-applocker and you can get it manually from here: https://www.microsoft.com/en-us/p/app-locker/9wzdncrfhzk3