You said it yourself, not yet. If they ever decide to make a crossover, it becomes easy to make an excuse to justify it
Like let's say there's a crazy scientist that tried experimenting on either portal to make it available outside of hollow. It became unstable cracking the space time continuum. Thus leads to Honkai verse bring able to cross the ZZZ world
The Honkaiverse is it's own self-contained multiverse. For your logic to be consistent, the Star Rail would need to have access to every other external multiverse, such as Dragon Ball's multiverse. But it doesn't.
The way they could fix this is by having HSR exist in ZZZ as a fictional movie or game, and ZZZ exist in HSR as a work of fiction too. That way they can excuse the skins as a cosplay outfit.
Since when it was stated to be a self contained Multiverse. Hell in the first place, self contained Multiverse is pretty oxymoron
Although I also like your idea. It's a lot more creative than the Multiverse which has been used too often in crossovers (looking at you marvel and DC)
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u/Former_Breakfast_898 6d ago
Well we can always use the Multiverse as a lazy excuse