ok i know u probably don't want to hear this but u need to. i know u put alotta effort into building your BP's enclosure (https://ball-pythons.net/forums/show...bitat-thoughts) but the feeding issue is probably enclosure/husbandry related. esp. when u say that she is always in her cool hide. if u are open to the idea of offering an ASF, don't do that yet. first follow this guide (https://ball-pythons.net/forums/show...-hatchling-101) and offer a (live) mouse like a hopper.
Edit: also i know its hard to resist - but u gotta be hands off your cute new little BP until eat alot more consistently.