Hi z_storz,
If your iPhone isn't turning on, it may not be charging correctly.
Try taking the steps here if your iPhone isn't turning on:
If your iPhone won't turn on or is frozen
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 until you see the Apple logo.

4. If your phone doesn't turn on, follow these steps to check your hardware and charge your phone. You might need to charge for up to an hour.
5. If your phone still doesn't turn on, contact Apple Support.
Let us know if you're able to get your iPhone started by testing other chargers or forcing a restart.
Thanks for using the Apple Support Communities.