Paracelsian spagyric medicine

[Rafal]

Yes, over the years numerous people have proposed such expansions from single characters to words or word fragments. It is also rather popular in recent LLM solutions.

Personally I call it "Christine Blackburn type solution" as she was maybe the first to develop something like this:
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The problem with these solutions is that if we replace Voynichese letters by some actions then we get enormously long strings of the same actions and concepts repeating over and over again like in the case of Christine:
hour hour plant sun midnight sap sap sun hour celestial orbit day sun

You are unable to say anything else. There are 20 letters so there will be the same 20 words again and again over 200 pages of manuscript.