Hi!
We are currently working on finishing our 4.3 release, which includes a revamped spine-godot for our new Spine Runtimes APIs. Once this is complete, we will work on support for newer Godot versions like 4.5 and subsequently 4.6.
Unfortunately, I don't have a specific timeline for Godot 4.6 support at the moment. However, if you need to use Spine with Godot 4.6 before official support is released, the spine-godot documentation explains how to build it from source, which would allow you to modify it yourself and integrate it into Godot 4.6.
Thank you for your patience and understanding!