If they actually live together, it should happen after she moved on early March. After she moved, the only holomem who ever went to her place is Shion, not even Rui. Shion's comments on her new place are her room looks like a boy's room and the water there is tasty.
Another point of time where I'm pretty sure she's still living alone or at the very least not with hitome is on 27th May. That day, she streamed valorant as nkok with mithwun and her other friends. She ended the stream abruptly as well, like she suddenly had to go somewhere. She couldn't though because she had her birthday sc reading at midnight, so she open this space https://twitter.com/LaplusDarknesss/status/1530138001703321601 pretended she had to clean her place, while her main goal was obviously to reschedule her stream. She was indeed cleaning her place, including her kitchen. That's why I'm pretty sure she's still living alone at this point because it's pretty unlikely the kitchen is dirty if someone actually cooked for her.
For the time when she probably already has roommate. It's very recent however, on 17th this month on her taiko stream https://youtu.be/R1wBVvuyp0U she said she had to close the door, which is pretty unnecessary if she lives alone and actually the first time ever happened. Mind you the knock incident happened only 3 days prior on 14th. On this stream she also told us she had recording all day tomorrow, so she'll stream the day after. At this time, the heat from rust incident was kinda died down, especially after she killed off her fanbox tiers.
On 19th, the day she's supposed to stream, she woke up at 10 https://twitter.com/LaplusDarknesss/status/1538324356191125504 and declared full body muscle pain and hour later https://twitter.com/LaplusDarknesss/status/1538337698712530944. This day was the day her valorant customs on feb which already known here since april, leaked on 5ch. I suppose she knew this after woke up and called it a day.
On yesterday stream, she admitted she didn't stream because she had important things to deal with. Her rant is 100% staged because she said she had permission to show her roommate on stream(or to have a roommate,I'm not sure. I assume it's basically both), which means she's fully prepared for this. As for whether she told us the truth, it's actually 50-50, with either she lives with hitome or someone else. The reason being the exact time she decided to do this bit. I'm sure she decided it on 19th or later, because the accusations are muscle pain after sex and playing game with bf, both happened on 19th. Which leaves her sign of not living alone not part of the script.
Now if she lives with her, there's several missing pieces. Like you said she didn't even knock as far as she remembered. Also both are active on twitter, but showing zero clue about living with or taking care of someone.
And if she's living with someone else, this is going to be really tiring moving forward for Lap and hitome.