The iPad Mini 6 has already received the latest iPad OS 15.5 update, which seems to have brought a number of problems to the device.
In particular, after the update, a number of users reported problems with charging their iPad Mini 6. In some cases, the device does not charge at all.
It is noted that the problem continues to occur even if the charger or cable is changed.
Apple has stated that it is aware of the issue and it is software in nature. Most likely, its fix will be released soon. A workaround is to install iPad OS 15.6 beta.