>>2292965She couldn't though. The conditions of her wish made it physically impossible to interact with the Universe, and Homura, until she was about to turn into a witch. By the time she knew she'd be incapable of interacting with the Universe it was already too late to go back on the wish and she HAD to abandon Homura for the time being, her only solace that promise Madoka made to her before fading away that they'd meet again some day.
You're blaming Madoka for thing she has no control over and while yeah, I hear you, you like the idea of Madohomu as well. I just don't believe it is right to say that Madoka could do anything about it.
She either has no idea who Homura is, due to the memory wipe that comes along with the timeloops looping around to when they first met, or her wish keeping her from interacting with Homura entirely.