Hey there andras17,
Thanks for reaching out to the Apple Support Communities. To get started, we do want to let you know that it can be expected for your iPhone to feel warmer than usual if charging your iPhone wirelessly. Additionally, if your iPhone gets to warm while charging, it may slow or halt the charging until your iPhone cools down.
You can find this information below from the following resource: If your iPhone, iPad, or iPod touch gets too hot or too cold - Apple Support
Your device might get warm
You might notice that your device feels warmer when you:
- Set up your device the first time
- Restore from a backup
- Wirelessly charge your device
- Use graphics-intensive or processor-intensive apps, games, or features, including augmented-reality apps
- Stream high-quality video
These conditions are normal, and your device will return to a regular temperature when the process is complete or when you finish your activity. If your device doesn't display a temperature warning, you can keep using your device.
If your device gets too warm
iOS and iPadOS devices have built-in protections to prevent overheating. If the interior temperature of your device exceeds the normal operating range, your device will protect its internal components by attempting to regulate its temperature.
If the interior temperature of your device exceeds the normal operating range, you might notice these changes:
Charging, including wireless charging, slows or stops.
Let us know if that's able to help.
Take care!