Where are the settings located in the App Store?

Those controls are in the Settings app. Open the Settings app and scroll down to App Store. Click and all of the controls are there with On/Off switches. They all have a short description under them. The setting that you want is all the way to the bottom.

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Describe the problem, and include any details about what seems to cause it. List any troubleshooting steps you've already tried or temporary fixes you've discovered.

M1 Mac mini, macOS 11.4; Watch, series 5 GPS/cellular, watchOS 7.5; iPad Pro 2nd Gen, iPadOS 14.6; iPad Air 2, iPadOS 14.6; iPhone 12 Pro, iOS 14.6; TV 4th Gen, tvOS 14.6  HomePods, audioOS 14.6 and Airport Express w/ Airplay 2