You can turn off the wifi as it doesn't really do anything. Navigation maps are supposed to update over wifi but I don't think anyone has ever had this happen. I had it turned on for a month and nothing with a year old maps on my 2022 (a couple of updates had been available). I had to manually update the nav maps (it's not difficult at all though):
https://stellantis.navshop.com/#/downloads
Click brand "RAM"
Click model "RAM"
Click system "Uconnect 5"
Click North America "Download"
Latest maps is from June 2023.
The truck has a cell modem with a sim card and will do updates over the cellular connection. I guess we just need to wait until Sept 29 though.