Trash feature to recover deleted items
I also had issues on how to recover deleted files but I couldn't recover. If the trash feature can be created it will really help to recover lost files.
I deleted a pdf whose Location was Google Drive, and iOS Acrobat deleted it completely. It did NOT move it to Drive trash as it should have, so I have no ability to recover it either from Drive, or Acrobat's (non-existent) Trash feature.