Many phones (certainly iPhone 12 behaves this way) will show 4G LTE link as being "5G" when they are connected to eNodeB that is capable of 5G in NSA mode regar

Many phones (certainly iPhone 12 behaves this way) will show 4G LTE link as being "5G" when they are connected to eNodeB that is capable of 5G in NSA mode regardles of whether the link actually uses any 5G NR bearer channels or whether it is actually physically possible (interference, path loss, gNodeB antenna configuration...) to use NR channels. Thus you can pretty well observe a lot of what really is 4G as 5G.