Charging problem

You may have a poor battery condition which cannot provide sufficient power for peak performance. What is the Battery Health of your iPhone? Open Settings ➔ Battery ➔ Battery Health and let us know which percentage you see for Maximum Capacity. Also note what is written under Peak Performance. If your battery's Maximum Capacity shows a value of 80% or less, then it has gone through its lifecycle and therefore should be replaced, according to Apple.

Axel F.

Using original charger and cable or certified one? How much is the battery health %?

Try unplugging the cable and plug it back.

Try a different power outlet

If possible Try a different cable and charger one by one to check if they make any change.

Check what has used the battery very much in the last 24 hours.