preferences:

class searx._settings.SettingsPref(*, lock: set[~typing.Literal['categories', 'language', 'locale', 'autocomplete', 'favicon_resolver', 'image_proxy', 'method', 'safesearch', 'theme', 'results_on_new_tab', 'doi_resolver', 'simple_style', 'center_alignment', 'query_in_title', 'search_on_category_select']]=<factory>)

Options for configuring the preferences

preferences:
  lock:
    - favicon_resolver
    - image_proxy
    - method
# ...

lock: set[Literal['categories', 'language', 'locale', 'autocomplete', 'favicon_resolver', 'image_proxy', 'method', 'safesearch', 'theme', 'results_on_new_tab', 'doi_resolver', 'simple_style', 'center_alignment', 'query_in_title', 'search_on_category_select']]

Lock arbitrary settings on the preferences page.