SImple Umami Search API database setup - https://blog.birk-jensen.dk/peek-inside-the-drupal-search-api-blackbox

search_api.index.gendev.yml

langcode: en
status: true
dependencies:
  config:
    - search_api.server.gendev
    - core.entity_view_mode.node.search_index
  module:
    - node
    - search_api
id: gendev
name: Gendev
description: ''
read_only: false
field_settings:
  rendered_item:
    label: 'Rendered HTML output'
    property_path: rendered_item
    type: text
    configuration:
      roles:
        - anonymous
      view_mode:
        'entity:node':
          article: search_index
          page: search_index
          recipe: search_index
  title:
    label: Title
    datasource_id: 'entity:node'
    property_path: title
    type: string
    dependencies:
      module:
        - node
datasource_settings:
  'entity:node':
    bundles:
      default: true
      selected: {  }
    languages:
      default: true
      selected: {  }
processor_settings:
  add_url: {  }
  aggregated_field: {  }
  entity_type: {  }
  language_with_fallback: {  }
  rendered_item: {  }
tracker_settings:
  default:
    indexing_order: fifo
options:
  cron_limit: 50
  index_directly: true
  track_changes_in_references: true
server: gendev

search_api.server.gendev.yml

langcode: en
status: true
dependencies:
  module:
    - search_api_db
id: gendev
name: Gendev
description: ''
backend: search_api_db
backend_config:
  database: 'default:default'
  min_chars: 3
  matching: partial