Recording video on iPhone and audio through a Focusrite Scarlett 6i6

[DR]

Hey folks! So I'm thinking of doing some talking head videos. I'm brand new to this, and could really use your help. I want to use the BMD camera app on the iPhone 16 Pro Max, and record the audio separately. The problem is, all my mics are XLR in/out. I have a Shure SM57 and an Audio-Technica AT2020. I can record into either Reaper of Adobe Audition (whichever you suggest). then put it together in DR. Is there a way to sync the audio and video via timestamp if I record the audio this way? Also, any other suggestions? Thanks!