Record my electric guitar with MusicStudio Lite through Yamaha AG03

Hello, I am trying to record my electric guitar on an iPod Touch (iOS 13.6.1) to take with me and listen to my practice exercises wherever I go. I am using the following setup: 1. guitar jack connected to Yamaha AG03 input; 2. AG03 USB output cable connected to a power usb hub to supply the AG03 from power grid and not from the iPod; 3. USB-B to lightning connector from power usb hub to iPod. I am pretty sure MusicStudio recognize the AG03 because in the setup-MIDI menu the MIDI input field shows: “AG03/06”, but when I push the record button in the track window no sound is shown/recorded. BTW, I used the same 1 & 2 above points plus a USB connection to my PC with Cubase LE installed and I can record the guitar. Am I facing a limitation of the Lite version? Thanks in advance. Best Regards.