Iphone Remote Access

I had a refund scammer attempt to connect to my Iphone today ,He instructed me to download “teamviewer Quick Support” off the App store .

Obviously i did not let them connect to my phone ,

My question is, I was under the impression teamviewer did not allow remote access of a iphone , I have teamviewer installed on my PC so the next thing i did was connect to my own Iphone with teamviewer. It allowed me to view the screen but would not allow me to input ,basically only allowed me to view what ever i was doing on my Iphone . My Iphone had to multiple steps to allow the connection and i am pretty sure the connection was timing out ,it was a limited connection

Whats the difference between teamviewer versions ? Is there a different version of TV they are using that will allow them to input on my Iphone

Josh