Xcode does seem better since I have experience with SwiftUI. However, I'm new to modding so I do need some advice on what I should do. Correct me if I'm wrong but this is how I understand it in terms of creating a modded game for non-jailbroken app with MM support
Jailbreak my iPhone so that I can extract the game's IPA file
Download Theos to decompile the app so that I can open it up in xcode
Use SwiftUI to add the mod menu and probably modify the app to integrate apple maps
Sign and compile the app using xcode
Sideload it using sideloadly
Profit
Edit: Thank you for taking the time to reply to me. I really appreciate it.