Uefn packs

how to place a map in an instant(open level) i spoke to the owner of a map and he said i can because he created it like so but i dont know how to open level of the map pack i bought,its only giving me 58 items which are part of the map like individual plants/grass etc,hes saying there should be a level file so the map is placed in an instant but i can’t do it,i need help with this.

Hi there. Could you please let me know which pack you purchased so we can take a look?