I think they ended support prematurely.
Support For The Sega Dreamcast's Web Browser Has Ended After 25 Years
Submitted 3 days ago by Salamence@lemmy.zip to gaming@lemmy.zip
https://retrododo.com/support-for-the-sega-dreamcasts-web-browser-has-ended-after-25-years/
MurrayL@lemmy.world 3 days ago
*Google support has ended.
Alternative retro-friendly search engines are available, and the article even gives a shoutout to frogfind.