rigging – Sketchfab refusing to recognize animation

Trying my first time to upload to sketchfab. Got a simple animated model with an idle animation.

Model’s rigged to a single armature with one root in a way where every segment except the tail is parented directly the bone, and it has IK on the legs.

Tried uploading the .blend file – model’s static, sketchfab says this :

So i export it as an FBX- no dice

I double check all the FBS animation settings – no dice

I bake the animation as action – still no dice

I switch blender versions and try both things again- not even an ounce of dice

I try GLTF2.0 and FBX again – zero dice

What gives? I tried every solution i could find. Does sketchfab hate me?