The IonCube loader can be enabled on a per-website basis. This setting is disabled by default.
To enable the Ioncube loader on a website:
- On the website dashboard select Advanced then Developer tools
- Scroll to IonCube loader
- Toggle IonCube On

The IonCube loader can not be enabled on websites using php 8.0 or 8.2. This is a restriction enforced by IonCube.
Also, see How to use custom ionCube versions