Is there a quick way to jump back to a reservation I just created?

Yes — there's a New button that opens a "Recent reservations" panel: a slide-out list of your most recent bookings — reference, type and customer at a glance — that you can click straight into, without building a search. It's separate from the saved quick-search buttons covered in Custom / Quick search: those are searches you set up yourself and reuse, while this is just a live list of what's recently happened.

Where to turn it on

Settings > Administration > Features > Enable new reservations search slider. It's off by default — once it's on, the New button appears alongside your existing quick-search buttons in Reservations.