i'm afraid this makes the dance and its music seem an even bigger unknown to me.
i don't know the Bolshoi Ballet staging all that well but none of what's described above 'connects' to moments familiar from other productions.
Gamzatti is aware of Solor's existence from the very start of her scene with Nikiya in the Rajah's palace, which is to say, her father's palace , usually given as act 1, sc. 2; Solor's portrait is prominently displayed in Gamzatti's chambers as she makes preparation for her marriage to the warrior.
likewise Nikiya is aware of Solor from the start of act 1, sc. 1.
so i'm stumped here.
the only dance i know, which most troupes outside Russia tend to omit, is the Danse Manu, which is part of the 'Betrothal Scene' usually sometimes act 1, sc. 3, or just as act 2, in which an unnamed dancer performs a number attended by two adolescent girls, who enact a desire to be given a drink from the jug artfully balanced throughout the dance on the main dancer's head.
perhaps others on the site will recognize the dance (and music) in question here.