She has two such scenes where she was a voyeur to Rob, but the majority of her scenes have been with Eric whether that be the first dare game, the beach segment, her masturbating while listening to him and Vi, the dance, the date. So definitely not "most of her scenes are interracial" watching or not.
I'm not saying nothing will ever happen (I both don't know and wouldn't say even if he had told me), but I'm just telling you that isn't the priority of her narrative or some such thing, and especially of her current arc. I do think something happening with Anya and Rob in some capacity at some point is likely, I'm just saying you're putting the cart before the horse. At no point has it been a priority to Anya in her PoV scenes to do something with Rob comparatively as to Eric. But saying it's "too focused on Anya and Eric" is subjective (I disagree whole heartedly and enjoy that arc greatly), it's as focused as CG wants it to be.
However, I don't know anything for certain and I'm no longer a proofreader (I barely even have time/energy to do basic renders these days let alone proofread), but I suspect that it won't be too far in the distance before more happens with the neighbours and Vi/Maki/Ari. I can tell you're super focused on the interracial kink and CG will of course continue to utilize it no doubt at all, but just keep in mind it's not going to pollute every aspect of the game. I feel like Maki telling Rob to basically fuck off in the silver update did a great job of illustrating that.
I feel like I've explained fairly well at this point so I'll leave it there, hopefully that clarifies things a little. And again most of this is based on both things CG has said publicly on the discord or convos I had with him months passed/things that got brought up in the dev chat.