Charging rate is limited by Li-Ion battery chemistry to protect the battery from damage, only the first 80 percent can be done quickly.
The EV's battery management system (BMS) then slows the rate of the last 20% charge to fully charge the battery. This is a standard feature
in all electric vehicles. You'd charge to 100% at a fast charging station when planning to do a long trip.
LFP lithium iron phosphate batteries on the other hand (like MIC Tesla M3's battery) can and should be charged to 100% at least once a week.