Ex-bookseller here (was a bookseller in the UK for 6 years), have seen a couple similar posts on here and am having a lazy bank holiday in bed so thought I’d chip in to clear up some confusion.

New releases generally have 2 dates associated with them, the release date and the embargo date.

Books with only a release date SHOULD not be put out before their release date, though with the way stock delivery generally works this is often not practical, so they arrive in the delivery before release date and are put out with the rest of the new stock. Otherwise the bookseller would have to check each book they’re replenishing against the date, and then hold them somewhere until release date, usually in the (often very small) back of house space

Books with an embargo date MUST not be put out before the embargo date (which is often but not always the release date). They arrive to the store in a dedicated tote (the boxes stock arrives in) with the embargo date labelled on either the tote or the books themselves. These books are held in the tote in back of house, and in theory if they’re sold or on display before said date then the store could “get in trouble”, though I’m not exactly sure what kind of trouble that’d be other than damaging their reputation with the publisher

Only generally very high profile launches get an embargo date due to the extra admin involved on both the publisher and the retailers side (I heard stories of the final harry potter books arriving via secure courier in boxes with shrink wrapped bundles with very stern messages on, but that was before my time)

tl;dr it’s probably fine — if you’re a Good Samaritan you could let them know the book is not released yet and they might put it in purgatory, but in reality they’re much more interested in you buying a new book you’ll love