Can I run this game on iPhone?
Yes. But if it works correctly, not sure.
Here below is just my scratches how to install it.
First, you should own a mac.
Then install RenPy SDK and Xcode. After that load the game in RenPy SDK and distribute through to iOS. Let the RenPy SDK create an Xcode project of that Renpy game. After that is done, launch the Xcode app via RenPy SDK(it will load automatically project within). You should log in with your AppleID, en then on your phone (General > DeviceManager) you should approve some settings about installing the unapproved app, kinds of stuff, agreements. At this point, your phone needs to be plugged with USB cable of course.
By click on building/run on Xcode it will start to transfer. On the left area appears some errors. In total what I have experienced is that there are 3 errors in total. When you just click on the first of it, appears that you need to approve and let Xcode perform changes, do this (just one click work). The second thing you need to do is signing your app, you need to sign you AppleID. after that 3rd is unnecessary you don't need to something. Run Build again and RenPy game it's on your phone.