iOS Files app doesnt show files in subdirectories of `/Notes` directory

Ive just started using the notes app and the official nextcloud ios app has an integration with the iOS Files app to show your nextcloud files. Im wanting to use an app called "pretext" to exit my notes on my iPhone but ive noticed that if the note is in a category I can see the category as a sub directory of my notes directory in the iOS Files app but the category directory looks empty. If i use the nextcloud app or web interface i can see all my notes in the category sub directory.

Steps to reproduce

1. have the iOS nextcloud app installed with the advanced setting "Disabled Files App integration" set to its default of "off"
2. create a note in a category from the nextcloud web interface
3. open the iOS Files app and navigate to "nextcloud" > your notes directory > your category name

Expected behaviour

category directory should contain .txt and .md files of notes created in notes app

Actual behaviour

category directory is empty

Server

• Notes app version: 4.3.1
• Nextcloud version: 23.0.0
• OS: Ubuntu 20.04.4
• Web server: official docker container
• PHP version: official docker container
• Database: postgres 13

Client

• Browser (incl. version): Firefox 98
• OS: iOS 15.3

Start by reproducing the issue through the iOS Files app integration, using the listed Nextcloud and iOS versions if available. Trace the integration's handling of the Notes directory and category subdirectories; done means note .txt and .md files appear inside category directories as they do in the Nextcloud app and web interface.