To add xdebug config to VS CODE for lando, use this config

{
    "version": "0.2.0",
    "configurations": [
      {
        "name": "Listen for XDebug",
        "type": "php",
        "request": "launch",
        "port": 9000,
        "pathMappings": {
          "/app/": "${workspaceFolder}/",
        }
      }
    ]
  }

To disable caching while testing your JSON:API endpoints you should put this into your settings.php

$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null';

but for this to work, you need to define this service null, which should be added as

You probably don't need this but for debugging purposes i checked system.install file and saw how dependencies are checked on drupal updates.
So to get full list of modules and its info run

$files = \Drupal::service('extension.list.module')->getList();

to get theme info go

If you get error like in subject when doing import of configuration, there is a good chance someone forgot to add some YAML file. In example