Yes, I’m aware of the issue. On iOS, pCloud and other cloud services work by creating plug-ins / apps that connect to Files.app. They are not accessible to apps in general.
There are two cases:
1) You want to access a file in pCloud – no problem – that works out of the box
2) You want to access a folder and its contents in pCloud – big problem.
Nitro only accesses folders, because of the need to read and write sidecars. It has to be able to write new files to the folder.
To access the folder and its contents, I have to write special code that talks to pCloud. And then write special code for Dropbox, …
The app has to handle the downloading and such which is more complex because of the sidecars.
I haven’t written all of that code yet, but will at some point. I will start with iCloud Drive and then build from there.