[occ] How to get a list of all possible <key> for recommended apps?

Nextcloud version :

  • version: 29.0.1.1
  • versionstring: 29.0.1

Operating system and version :
Distributor ID: Debian
Description: Orange Pi 1.0.6 Bookworm
Release: 12
Codename: bookworm

Apache:
Server version: Apache/2.4.57 (Debian)
Server built: 2023-04-13T03:26:51
Server loaded: APR 1.7.2, APR-UTIL 1.6.3, PCRE 10.42 2022-12-11
Compiled using: APR 1.7.2, APR-UTIL 1.6.3, PCRE 10.42 2022-12-11
Architecture: 64-bit

PHP version :
PHP 8.2.7 (cli) (built: Jun 9 2023 19:37:27) (NTS)
Copyright (c) The PHP Group
Zend Engine v4.2.7, Copyright (c) Zend Technologies
with Zend OPcache v8.2.7, Copyright (c), by Zend Technologies

Hello. Is it possible to get a list of all possible (developer-intended) key ​​for a particular application using occ?
For use here:

$ ./occ user:setting

user:setting [--output [OUTPUT]] [--ignore-missing-user] [--default-value DEFAULT-VALUE] [--update-only] [--delete] [--error-if-not-exists] [--] <uid> [<app> [<key> [<value>]]]

For example, how do I get a complete list of all possible key ​​for a files or files_sharing application?
And if you can get a complete list of all the allowed key ​​for each recommended application, then where is the best place to read help explaining the allowed value ​​for those key ?