It's pretty relatable. A lot of apps like to use their own folders, like my lemmy app.
If I download files from my banking app they get saved to root (sdcard), most others save to my Download folder. Then there is DCIM where I have photos, but Telegram does not care, for Signal I have to export each file to the file system seperately.
The worst thing though is that the files in Downloads/ are ordered A-Z by default. No idea if this is a LineageOS thing, but it drives me crazy.
At least in Germany that step is not necessary as far as I know.