That information is wrong, Lucy47000. It was never confirmed what style the PPG reboot would be animated in, because it hasn't been greenlit for production. AI overviews often show incorrect facts, so you shouldn't rely on them unless they cite their sources.

With that said, Craig McCracken did confirm he had mixed ideas for the art direction of the series, as was discussed here before: https://powerpuffgirls.fandom.com/f/p/4400000000000070990/ That's probably why the AI overview thought it was confirmed for sure that the new series would be mainly 3D animated.

Powerpuff Girls will be 3d animated! | FandomBack in June, Craig McCracken for the announced…powerpuffgirls.fandom.com