While I'm not that good at explaining at matchups, I want to give out my thoughts of some of the Robo-Fortune matchups so far. I still need more experience to analyze the matchups better, but I'm giving my best shot of describing on what matchups can Robo-Fortune deal with. Here are my thoughts of these matchups.
Fukua - I find this matchup to be fairly even, maybe slightly in Robo-Fortune's favor. Robo-Fortune has lots of tools that can deal Fukua's space control like firing Theonite Beam or even setting up headrones if Robo-Fortune is far enough not to get punished, and she can do super jump HK to fly around and avoid Fukua's j.HK pressure. What Robo-Fortune needs to be careful for is that being fairly close to Fukua can get you pressured, and Robo-Fortune doesn't have a very good reversal to avoid the pressure. Robo-Fortune also needs to be careful about Fukua's Shadow Clones or Drillationship if Robo-Fortune gets fairly close as well. Aside from that, there's not much problem Robo-Fortune has to deal with Fukua, so I think it's fairly even.
Eliza - This matchup is in Eliza's favor in my opinion. Sure, Eliza can get hit by Robo-Fortune's jumping mixups like j.LP, delayed j.MK or whatever, but Eliza can counter her with s.MP + Dive of Horace if she reacts fast enough, and Eliza can also do c.HK to sweep through Robo-Fortune's zoning. Plus, Eliza's mixups, such as with her AD j.LP, j.HP, can easily overpower Robo-Fortune, since again, she doesn't have a good reversal, so she has to guess right to avoid getting resetted. What Robo-Fortune can do though is that since Eliza doesn't have a great reversal option either, Robo-Fortune can pressure her and throw + Magnetic Beam on midscreen, then start a combo + mixup. Zoning against Eliza isn't a good idea IMO, unless I want to chip her.
That's all I can think for now. I don't really main Robo-Fortune, but she's really fun and interesting to play, and I would love to improve my skill with her eventually. Robo-Fortune and Beowulf are in my tertiary team.