I have winter mode, no preconditioning. And until now hadn't realised the need. I don't use the car navigation to set a DCFC location because it's functionality is pretty basic, I do not think I can set it to find DCFC chargers only. Is there a filter system I'm unaware of? I'm quite lazy and when away from home tend to just stop at service stations and hope they have a charger available. And as described on the tin, thought a fast charger fast charged your car...
I can understand your frustration and at least I have a little consolation for you. But before I answer some of your questions, one important thing first.
The charging power is always given in kW, the amount in kWh.
I.e. you charge a 180 kW charger with e.g. 60kW over a certain time (that's why the hour is added) an amount of energy, e.g. with 60kW in one hour 60kWh.
Because I'm from Germany, I can't answer the navigation tips in detail because I may have a different software version or equipment.
Nevertheless, you can select the charging stations under POI and click on the filter when selecting the charging stations, e.g. along the route. In the filter you can differentiate between charging station operators such as IONITY and also between charging speeds such as HPC, DC and AC.
It is best to select everything for both points, because only what you get in the filter later displayed as a charging station will be recognized by the system as a charging station and used for preconditioning if you then have the function. Otherwise, if you simply select the address of the charging station or send it to the car via the Kia Connect app, the vehicle will not recognize that it is a charging station and will not precondition.
But now to your consolation:
Your car can also preheat the battery if it has the battery preheat function. It should have, because you mentioned winter mode.
Your car warms up the battery by about 5 degrees Celsius within 15 minutes if you precondition it via the app.
For example, if you want to charge faster than 130kW on a corresponding fast charger, you need 15 degrees in the coldest cell.
From 10 degrees you get about 70+kW under 5 degrees 50kW.
So it makes sense that before you drive your car to charge, you warm up the battery to 15 degrees and run the pre-air conditioning for 3 x 15 minutes.
Important to know, as others have said, the ride does not heat up the battery. Even if, as is possible in Germany, you drive the entire battery flat at full throttle and 190 km/h. The car manages this with so little power that the airflow cools the battery faster than the heat from the engine can heat it up.
That's why it makes sense in winter to drive shorter distances between charging stops so that the battery doesn't cool down too much. You should be able to keep the temperature above 10 degrees, but there really isn't much more possible.
I hope the information helps you and I keep my fingers crossed that you will soon receive the software update for the battery preconditioning for fast charging. This is because charging works really well in winter, iff you also meet all of the conditions mentioned and the known ones too.
P.S. Another addition, because you said yourself that you don't deal much with the vehicle. I would try to fast charge the car at 20% or less in the winter. Not at 47% as you did. Then it has enough time to bring the battery up to temperature before the charging power drops due to the high filling level (SOC). Luckily, the charging curve for the EV6 is really good up to 54% and only drops sharply from 77.5% SOC.