Where are the apps that I have bought?
Where are my apps purchases?
iMac 27″, macOS 10.13
Question marked as
Where are they in regards to what?
Are you trying to find downloaded apps on your device? see here: link-> Use Launchpad to view and open apps on Mac - Apple Support
Are you looking for your purchase history? See here: link-> View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support
Are you trying to re-download them? See here: link-> Install purchases from the App Store on Mac - Apple Support