New projects would appear there

This was in Scratch pre-3.0 but they removed it because inappropriate projects showed up. I expect it won't be re-added.

Something like this has existed before, but it was removed.

The Scratch Wiki wrote:

The Newest Projects row on the Front Page was removed due to inappropriate projects being displayed.

Source
There is, however, a “Recent” filter on the explore page.

Yeah - we found that many new projects were quite rough and the creators of those projects (often people new to Scratch) would get mean comments. And some projects were not appropriate for all Scratchers. So I don't think we'll be trying that again.