Solved Bedrock Edition
Maybe I'm overlooking.. But I believe the mc apps should have file access for modifications and an update!
If not, how can I access them without using the frontend access?
The current UI (which was only written for the Cloudron packages) does not support editing config files in the browser, however you can open a remote terminal into the app through the cloudron dashboard and edit the config files there. Would that be sufficient for you for now?