Found something very interesting

So I myself have not been able to figure it out, but I’ve recently gotten back into iPods again and purchased a USB-C to 30 pin charger just so it would be easier for me to have the newer blocks to charge my iPod and using this charger I plugged the USB-C and into my iPhone 16 Pro and the 30 pin into my iPod classic fifth GEN and it tells me do not disconnect. I was wondering if any of you guys would be able to do the research to see if there’s any way that we can transfer songs onto the iPod through our phones when I connect it like I said, it says, please do not disconnect and also shows the charging icon when plugged into my phone and the iPod.