Does stock ES use post content instead of just thread titles in the search bar autocomplete?

invalid@example.com (Kevin), Kevin
Tue, 12 Aug 2025 15:10:31 +0000
Enhanced Search support

When typing into the search input box and the list of suggest autocomplete results are shown, on a stock ES (meaning just XF's ES add-on and not combined with any 3rd party add-ons like ES Essentials, etc.), does autocomplete show matches for text inside of posts also or just matches on thread titles?

For example, typing in "commodore" here into the search box shows no suggested matches but the actual search results show several pages of matching posts with the word "commodore" in it.