So, basically, to block an app from being downloaded, you need to use a feature called app restrictions or app blocking. This feature allows you to set up rules for which apps are allowed to be installed on your device. You can do this on most devices, including smartphones and tablets, by going to the settings menu and looking for the app restrictions or app blocking option.
From there, you can choose which apps you want to block, and even set up password protection to prevent others from changing your settings. It's like, you're in charge of your device, and you get to decide what apps are allowed to be installed. It's a great feeling, especially if you're a parent or a business owner who wants to control which apps are used on your devices.