strange behaviour

My sister recently bought an iPhone XR to substitute her old 32gb 6s. she made the initial setup and everything and was planning to use her old 6s as a media player or backup device, but... for some reason the 6S mirros everything that is installed on the XR, for example, she installed COD...

Could I please get some help breaking down what some of these are? I know it’s not good, but maybe origins or an idea of why this is happening to me? Please. Forgive me, this is what I’m concerned about: IP Address: 192.168.20.2 MAC Address: Hostname: iphone State: Online First seen: 12...