Have any language servers used the LSP Notebook capabilities?

Does anyone know of any language servers that use the notebook capabilities introduced in LSP 3.17? Do any clients actually implement it?

I've found the official documentation from MS, but I haven't really found much else beyond that.

It seems promising for one of my long-term projects but I'm not even sure I understand what exactly it does, and I'm pretty sure what I have in mind is far from its intended use case.