They've already got more FTEs on this than Amazon seemingly put on OpenSearch.
We provided a dedicated team on a temporary basis. Once the project is in the foundation, we will make a financial contribution, with which dedicated developers will be funded. At that point our devs will gradually hand over to the new, fully independent team. The other members of the initiative so far follow the same pattern but I can't speak on their behalf re: exact commitments.
Do you know if the Terraform language server will also be forked? It has also suffered from Hashicorp's lack of attention.
EDIT: oh you answered that question in a response to my top-level comment. Thank you!