The Hawking–Page (HP) phase transitions of the anti-de Sitter black holes in extended space are studied a novel four-dimensional Einstein–Gauss–Bonnet (4EGB) gravity, which is proposed by rescaling Gauss–Bonnet (GB) coupling constant α→α∕(d−4) d dimensions and redefining gravity limit d→4. GB term shows nontrivial contributions to both hole mass entropy simultaneously, decreases HP transition t...