Seasons 4-6, I believe. My gripe is just them calling it an "original" of theirs.
For comparison, Hulu did a similar move for The Orville for its 3rd season. But instead of calling it a "Hulu Original" the title says "Hulu presents".
Edit: Nevermind, I was wrong. Hulu is actually worse lol. "Hulu presents...a Hulu Original...A 20th Century Production...The Orville: New Horizons". Though they did run the show with a new name (New Horizons) so maybe that does count as an original production.