Click on save draft on the bottom left of your listing capture to save your current listing under your drafts:

To access your drafts, go to your listings page, select the filter, and click on status to select the drafts filter for all your listings.

Another section in Base you can visit to find newly added listings is the Audit Trail.

It captures all events, including new listings added. To access this section, click on the Cogwheel, go to Settings, and then select Audit Trail.

You can reach this section directly here: Audit Trail.