In Lyra, there are no blendspaces in animation layers blueprints, only some 1d blendspaces in base abp.
For animation sequences usage as variables Lyra uses onupdate function
where it converts node to sequence player and sets sequences on it
But there is no option to do this for a blendspace (eg convert a node to it).
I also tried just to use 1 blendspace per layer abp, but if it’s parent is not AnimInstance, but common class, like ABP_ItemAnimLayers, the blendspaces non-variables in Animation Layers don’t work for some reason, they play only when parent is AnimInstance, that doesn’t allow to extract some common functions for layers.