Tyre pressure control system/RDKS

Hello everyone. For the first time I post here. Sorry for any errors. I use Google Translator because my German knowledge is not very good. I just moved here from Florida and just bought the 2023 KIA-CEED-SW > 160 PS/Automatik. Hopefully someone can give me information about my request/question. Currently the car has no tire pressure control system/RDKS, but it has a “SET” button for the tire pressure and also the possibility of a vehicle diagnosis b normal, but I can’t find out where you can actually monitor this. Which I find very strange. How does the car know the tyre pressure when the car doesn’t have a tyre pressure control system/RDKS? I’m 100% sure that the car doesn’t have a tyre pressure control system/RDKS, because I had this option with my car in the USA. The KIA only installed normal tyre valve shafts. How does the car know if the tire pressure control system/RDKS has this option in my car in the USA. endruck is normal, and gives you the opportunity to “SETZEN” the tire pressure without having the tire pressure control system / RDKS? My general question… Is it possible that the software of the car recognizes this when I have bought and installed four tire pressure control systems / RDKS? Or is it a software function that may need to be activated, or is this function perhaps not even available for my special vehicle type? The confusion for me is .. . Why do the “SET” and vehicle diagnostics then have the tyre pressure without any other way to check the tyre pressure? I hope that makes sense. I have added photos so you can see. Thank you for your time. PEACE & VIEL RESPEKT >