Not really. Does the slow charging of iPhone have anything to do with the rear plug cable? This is no specific relationship, because its charging power is mainly determined by the device itself, if the power supported by the device is high, then the use of high-power charger is relatively fast, if the device supports the charging power is relatively small, then it can only support a small power charging.
It has little to do with the wiring, because it is related to the power supply. Do you consider whether the tail plug interface is oxidized and aging? First can check whether the background software is too much? The operation power supply is insufficient