Disclaimer: I am on beta IOS software and for me, the game has crashed several times. I have watched a number of other videos and heard impressions and no one mentions the crashing - therefore I believe this to be an environmental issue related to my beta software, and don't judge the game or capcpom for it.
Update: I have set the resolution to 2340x1080. Metal upscaling to Performance, reduced ambient volumetric lighting to low, and shadows to medium. All other settings are set to high.. My phone has cooled now that it isn't fast charging to 80%. Phone is still slightly warm right by the processor near the camera. Would guess 37-42c. I'm letting it sit to see if it warms up. 15 minutes now in an area with a lot of stuff going on- shadows, geometry, godrays, etc. Haven't noticed any meaningful increase in temperature. Performance is unlocked - I would probably recommend finding your desired fidelity level and locking the frame rate. While it certainly can go well over 60 in my experience - ofc I have no way of measuring the actual framerate, but I can tell you its over 60 - it seems to fluctuate heavily based on what's going on on screen. For a real deep dive into the analytics we would need someone like DF. For my primitive cave man impressions - I'm impressed. The next test I will do is a battery drain test. See how long it takes to kill it from full.
I am impressed that we have full access to all typical PC options. I love the control we have to tailor the experience. That bodes well for the future.
I think this is a monumental first step that can't be understated. For a fanless device to be able to push fidelity like this is incredible.