It's got some syntax similarities, in sort of the same way that most of the C-family languages look similar (for those languages, curly braces, if statements, semicolons, declaring data types; for Solid and React, function components and JSX syntax), but that's it.

FWIW, from my own viewpoint in the middle of the React ecosystem, I think Solid looks like a fascinating approach and it has a bunch of reasons to be worth considering in its own right. Doesn't mean it'll magically gain adoption or ever be considered one of the major players in the web framework space, but it's definitely far more than just a random toy project.