So, before we start spewing a million baseless rrats, who actually watches Lumi streams, how often is she talking about the lack of communication with Pippa, and is this talk being instigated by Lumi or retards in chat first?
Lumi does a lot of "just chatting" aka "yapping" before playing games on her Twitch streams, usually lasting at least an hour, usually more. While my viewing of her streams have been more erratic lately due to holidays and such, I've seen this come up because of whatever is being talked about is related, and it's brought up by chat. It's not something out-of-the-blue that someone just brings up. It just kind of led to it due to it being related. Lumi also tends to be very blunt, so it's not surprising she's expressed her feelings on the matter.
I won't speak for Lumi because I'm just a fan and nothing more, but I highly, highly doubt she's made these comments to "pressure Pippa" into replying to her DMs. It's not like the talents are all aware of what goes on in each other's streams. And I would hope they wouldn't, but someone who watches Pippa more may be able to chime in about whether they've seen anyone bother Pippa about it, particularly from Lumi's community, though I know that's getting a little too specific. It was just likely her having a conversation with her chat and expressing this when it was brought up.
You can have your opinion on whether or not she should be mentioning it on stream, but it's unsurprising that Lumi might be upset by it. Pippa was probably one of Lumi's first vtuber friends, especially outside of CL, and was a huge part in her joining Phase as an Invader. Hell, Pippa told Dizzy that she wanted Lumi in Phase bad from when she saw Lumi debut in CL. They always seemed to have a lot of fun with their collab streams together, and they would last a long time. Lumi was also pretty excited to start up the Yabcast with her, but obviously that fell through.
Despite this, I highly doubt the reason for the lack of communication is because of any bad blood. Pippa and Lumi have been in multiple group collabs together within the last year, including an off-collab, and they seemed to get along and have fun with each other just fine. I won't speak for Pippa either, but I highly doubt the lack of communication from Pippa is malicious. It is well-known that Pippa is bad at answering DMs. This is something that has been noted by plenty of people, including herself, and as shown in the Shorts I previously posted, she acknowledges and even jokes about it. Again, I don't think it's personal. As has been said many times too, it's probably just her brainworms messing with her or something.
But, this is just all of my speculation. I think it's a shame because I always enjoy their collabs together, and I hope they eventually figure things out.