Yes, Redmi k30 and millet for a company, their products can be universal, Redmi k30 charging speed although there is no 55w, but the charger 55w represents the highest power 55w, not only for 55w mobile phone, for example, you use 55w charger to 30w charging efficiency of mobile phone charging, His actual power will be about 30w, if you use a 55w charger to charge a mobile phone with 100w charging efficiency, his actual power can only be about 55w, so do not worry about the problem of mismatch
It does not support 55w fast charge. It supports a maximum of 33w fast charge.