Not really optimized for iPhone devices, it got really heated, really fast. Also export is not working

I have iPhone 13, and for now I have edited two videos around 5 minutes, very simple edited videos while editing it works good, I like the app and experience but for time to export it started overheating very fast and app crashes and I couldn’t export. 
after 10 times after trying I manage to export my file in 1080p rather than full quality. 
I like the app and experience but I think you guys are focusing so much on reel oriented app but I would appreciate if you all help with long form content video editor (e.g. YouTube video) I am not asking for fully fledged fancy editing features and all just good enough to create 30-40 minute video (simple editing and all that features that it already have) just with exporting issue solved.

thank you

-musashi