That, I’m afraid, is because the Tapo integration is a community integration, so you’ll have to install that yourself first. It is the same developer that is behind this integration as is behind the built-in Kasa integration. You can read about the Tapo integration here: https://community.hubitat.com/t/release-tp-link-tapo-plug-switch-bulb-hub-and-robovac-integration
The installation says that it is recommended to use HPM (Hubitat Package Manager) to install it. Many community drivers and apps use HPM as it makes for a much better experience for the user to manage their community apps and drivers. HPM is also a community app so you’d first have to install that. Instructions are here: https://community.hubitat.com/t/release-hubitat-package-manager-hpm-hubitatcommunity
