Generic method to export app data?

Is there currently a simple way to just access/export all data from an iPhone app to a MacBook computer? I have been using a third part app for 5+ years in which I created a lot of data, mostly audio and video files. Unfortunately, it turns out the app doesn't have any sort of 'export' function and I can't access the data in the iOs Files app or in a simple way via my MacBook. I have not found any way to access the data from this third party app. I've tried iMazing, but it seems that the functionality of iMazing seems to have gotten very limited, correct? It seems to only allow me interact a few dedicated apps. I've gotten to a point where I don't even care right now whether I can actually extract the data in a usable format. I would be glad if I can just back up the app in some way or another, to re-install at some later point (including the data) and deal with it later. Is there any way to do any of this? It baffles me that I have so little control over the apps, or even just the data I've created on my iPhone.