>>41799990She won't bring it up if Pekora wants it that way. Just how it is.
Just watch when they meet until it's over. Miko unfortunately got ignored a few times, but she didn't give up. Pekora was a lot more responsive later, when it was only Miko talking. She tried to banter with Pekora after the match, even yelling her iconic "Usadaaaaaaa and so on. All of that in the spam of the few minutes they were together in voice.
For RUST, watch the fireworks stream. She tried to start some sort of conversation with Pekora more than once.
Similarly on Mario Kart, when Pekora said she was last, Miko immediately tried to motivate her, and would reply when Pekora wasn't talking to anyone in particular, or when they were talking about tag-teaming Suisei to take her down from first place, which she did well throughout the whole thing.