Can you do 2 times high intensity workouts in a Single Day ?

Though, it is possible to do two workouts in a single day. However, it's important to note that doing so may not be necessary or beneficial for everyone, and should be approached with caution. If you decide to do two workouts in one day, it's important to plan your routine carefully to avoid overtraining or injury and to have appropriate rest along with nutrition.
https://www.icfitnessclub.com/diploma-in-personal-trainer-course/