Input LUT for iPhone 13 ProRes videos?

I'm working with the new ProRes recording supported in iPhone 13 Pro.

Is there an input LUT available to convert to Rec 709 as a starting point?

Note that I have been testing both the iPhone video app and FilmicPro.  My goal is to use this as a learning tool to understand color correction and color grading.  I am not trying to export "production" projects using this setup.

Since I would need to buy an Atomos or equivalent to record from my Nikon Z6, I would prefer to start with this setup before deciding it is worth upgrading to a ProRes workflow.