Can iOS 13 beta be uninstalled?

Here’s what to do: Go to Settings > General, and tap Profiles & Device Management. Tap the iOS Beta Software Profile. Tap Remove Profile, then restart your device.

What happens if I delete iOS 13 beta?

Once the profile is deleted, your iOS device will no longer receive iOS public betas. When the next commercial version of iOS is released, you can install it from Software Update.