My iphone 14 max is glitching i tried v up down and restrt its not working is a relativeliy new phone promax i phone 14 plus

Is a forced restart not helping or completely not working? Try to force restart it while following these instructions

Force Restart iPhone

1. Press and quickly release the volume up button.
2. Press and quickly release the volume down button.
3. Press and hold the side button.
4. When the Apple logo appears, release the side button.