No, the Wine developers refuse to accept contributions from ReactOS developers or even people who have seen ReactOS code[0]. So any improvements go one way only.
[0] https://gitlab.winehq.org/wine/wine/-/wikis/Clean-Room-Guide... (last "Don't" entry)
So they don't use LLMs to help code at all?
LLMs have likely seen the leaked Windows source code lets be honest...
You are saying that ReactOS doesn't use clean room code? Source?