You know, thinking about it she could learn a bit from Henya (which isn't really doing anything different from most streamers of her size):
Like using again her YouTube channel for clips, what games to play, other different fun segments, woman to collab with, starting and ending times...
But her fundamental problem is that she doesn't understand the difference between the YouTube style of streaming and the twitch style of streaming and why both work in their own way.
The YouTube model works because they announce them previously like a fun main plate with some objective to achieve. Kinda like a tv show.
It's attractive to watch because it's shorter and more focused. It's "wow, can't wait for chuuba to react to the beggining of this game or to beat this famous boss". And if you lost you actually have a proper archive.
This doesn't work in twitch, there's no eye-catching thumbnails, no frames (technically you can put in the calendar but it's not a place people check), poor archive with no possibility of comments or timestamps...
The twitch model works as some sort of accompaniment through the whole day. There's no previous announcements (normally) but it doesn't mean it's guerilla.
They usually start at the same hours and since they stream many hours almost everyday you're never missing everything and fans get an habit of checking that timeslot anyways. (Btw, she used to start at the same hour as Rushia).
Twitch streams are like many side dishes like a buffet or tapas. There's plenty of variety and changing from one game to another depending on the mood of the audience, there's a feeling at being part of the everyday life of the streamer (she almost understood this before).
What Nazuna is doing: short streams, guerilla, vastly different start times, Minecraft/Apex shit spam, not as "tv show" as YouTube but not as easygoing as twitch (forcing herself to stream in bad conditions), no karaokes, no watchalongs, no ASMR...
is basically bringing the worst combination out of both worlds.
Well, at least she's more consistent nowadays.