OpenTofu/Terraform provider for NixOS

Hello everyone, Forgive my naivety here, but is there any kind of opentofu/terraform provider available for nixos machines? I am aware that proxmox has this, and I have taken a look at running openstack on nixos as a possible option without much luck. I know you can technically write nix code which can manage VMs and networking, and this is what I’ve been doing in my home lab, but opentofu seems like it would be a much cleaner and platform agnostic solution at scale. Where I see nixos potentia...