Agreed. Pd fast charging head generally refers to the charger that supports the pd fast charging protocol, which is generally universal with Huawei's charging protocol. So if you use Huawei's fast charge to charge other phones. Can be downward compatible, this is generally no problem, but there will be some differences in charging speed, in addition to no other problems.
A 100 watt pd fast charger can charge a mobile phone
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The 100W usb-pd protocol fast charger supports 3.6V to 20V output voltage automatically adjusts the output according to the charging protocol of the device being charged, that is to say, if the charged mobile phone does not support pd fast charging, it can normally output 5 volts of voltage to charge. If the phone supports the pd fast charge protocol, it can be quickly charged.
You can charge ordinary mobile phones, but the protocol does not support, there is no fast charge