Our last robo was always a bit like this. It is time and patience. I'm not sure how often you're cleaning the cage, but cage cleans can stress them as well. It's usually recommended to leave the cage alone for the first couple of weeks while they're settling in and not move things or disturb things - maybe a bit of spot cleaning of pee area (if you can find it!) If not then it's probably ok for a bit longer
Most hamsters don't like a hand in the cage but an untame robo especially. Some robos can be tamed, some are more for watching and talking to. It takes a concerted effort to tame a robo though I think.
Ours was never really tamed - just a little bit. He did exactly the same as yours and was wise to even a mug appearing and wouldn't go in it - he would run behind his wheel and flatten himself between the wheel and bars where you couldn't get at him.
If she's been adopted it can take longer to adjust - not just a new home and a new cage but a completely life change as well. I would carry on with just talking to her through the bars and giving the odd treat through the bars.
Our robo would sit and have long conversations - while I was talking to him and did a lot of non verbal communication! But he was very much a "look don't touch" hamster.
So I would hold off doing anything in the cage a bit longer, just put food and water out, and chat to her through the bars - put a treat through the bars - if she doesn't come to take it then leave it half in and she'll take it later.
What I did for cleaning with our robo's cage was to do half the cage at time- mostly spot cleaning - rather than a full clean. So I'd do the left half - which had the wheel and his second burrow/nest. He usually moved out of that burrow afterwards into his house on the other side of the cage where he had another nest. A couple of weeks later I'd do the right side of the cage. And he'd move backto the burrow on the left! That way he always had one half of the cage undisturbed.
They pee so little that a lot of it probably evaporates! I could never find an actual pee spot so just spot cleaned when doing the half cage clean.
When she's settled a bit and sits and listens when you talk, then you could try getting her out in some kind of receptacle. A mug didn't work for me but I used a snooze cube - large-ish fleece cube with a hole at the front and he liked that so would walk into it and I'd lift him out that way. Otherwise it may be a case of just removing everything from the cage and then scooping him into a mug (had to do that too). For a taming session.
A playpen would be good for taming. I enjoyed that - had a robo running up my trouser leg (sit in the playpen with her and she'll run over you and get used to you. It's also easer to get them used to being handled if they're in a playpen. I would pick ours up and immediately turn my hand over so he was on his back and stroke his tummy.He tended not to move when he was on his back. But always do it low in case they wriggle free, so they don't hurt themselves - and keep away from the edge of the playpen so you don't become a route out of it.