isn’t an action figure. It’s a burial object.
Read complete information about the tomb in which it was found here – https://unframed.lacma.org/2017/09/21/archaeology-el-%C3%BA-waka%E2%80%99-maya-ritual-resurrection-scene-broader-perspective
Other figures with separate pieces also exist from this time period – around the 7th or 8th century.
–See more images of this figure and related items here.