Unsupported Features for some phones

I'm currently doing a code where I need to manipulate some lists inside of the code. However, the device I am using, Iphone 15, isn't able to run some of the code, while others phones can (usually Android). It makes it impossible to test my app since it breaks every thing inside of it, including code that has nothing wrong with it at all. Is there a way that maybe the App Store MIT could be updated to allow support for phones similar to mine for apps like these?

Can you expand on what parts of manipulating lists are not working on your iPhone?