Uninstall applications with AppCleaner, Pearcleaner, TrashMe 3 or App Cleaner & Uninstaller.
The list of the apps is fetched using Raycast's API. If you just installed an app and it's not showing up in the list, try restarting Raycast.
You can now pick any app as your uninstaller from the extension preferences. Make sure the selected app supports receiving an app path as an argument (e.g. via open -a <uninstaller> <app-path>). Apps like AppCleaner, Pearcleaner, TrashMe 3, and App Cleaner & Uninstaller are known to work well.