KODY4BRUH
C3 official Spine runtime is under development. Most of the features are already there, it just needs some polishing.
You can find more info in the related issue: EsotericSoftware/spine-runtimes2910
GDevelop has a runtime maintained by the GDevelop developers, and you can find it here: 4ian/GDeveloptree/master/Extensions/Spine.
Unfortunately, they are sticking to pixi-spine, an unofficial, old, and unmaintained Spine runtime.
I think upgrading it to the latest version is not a priority for them.
Also because they are still bound to PixiJS 7 and probably their main priority is to try to upgrade to PixiJS 8.
We have both spine-pixi-v7 and spine-pixi-v8.
Once we finish with C3, I might have a look at GDevelop.