Thank you! Regarding the GLB/GLTF stuff, the issue seems to be with the exporter itself. The default Blender exporter doesn’t quite cut it for what I need. I think it might take an experienced programmer to create a proper custom Blender addon that can export GLB/GLTF cleanly for game engines. Honestly, I’d totally pay for something like that.
That said, seems that my animations already work out of the box in Godot, no conversion needed! Here's a quick video showing that in action using Godot 4.3: https://www.keviniglesias.com/videos/GodotAnimationTest.mp4
EDIT:
A better video explaining the process here: