iPhone low latency monitor mic input

What are the best ways to hear myself sing in real time using an iPhone 13?

Bluetooth of course is out.

i purchased some Shure SE425s and an aux to lightning dongle thinking that would work. Without an exhaustive search it seems GarageBand for iOS is the only way to monitor in real time. Yet, there’s still an annoying latency.

i saw a while back some $50-200 mics that plug into the lightning port. Additionally, some of those had an aux port on the mic itself.

Thank you for your help