How many ip addresses am I supposed to have

Up to two, one IPV4 address, and one IPV6 address. You will also have different IP addresses for cellular data and for Wi-Fi, and if you have iCloud Private Relay enabled you will have an IPV4 and IPV6 for your private relay connection.

Further, if you have 2 cellular connections on your phone you will have different IP addresses for each cellular data connection.

IP addresses are not permanent.

They are assigned whenever you join a network.

I am connected to my WiFi network, I have 3 IP addresses. Two are IP version 6, one is IP version 4.

why are you asking?

For all practical purposes no one can load software on your phone, unless you fall into the category of drug dealer, dissident or journalist in a country with a repressive government or other prominent political or cultural enemy. Why? Because the software to infect an iPhone costs millions of dollars, and you probably aren’t worth it. Further, the software that can do this is invisible; if your phone has any you would have no way of knowing.

If you describe the weird activity I’m sure another user can help you resolve what is causing it.

One for each device.