iPadOS doesn't have an "App Launcher". It has Home Screens upon which App icons can be installed and opened - and an App switcher page that is accessed using an upward-swipe (with a pause before lifting your finger from the screen) from the bottom edge of the screen.
Perhaps you can offer more information about what you anticipate seeing in specific circumstances. Posting a screenshot (suitably redacted, using markup tools, to remove personal or sensitive information) can help to illustrate a problem:
Take a screenshot on your iPad - Apple Support
You can post your screenshot here using the image button located at the bottom of the message editing window:
