I checked this, It work as in eevee.
But I downloaded a model from Blender nation today.
The shape can be adjustable in Hair shape and it show in his solid viewport.
https://www.blendernation.com/2020/03/01/free-download-pug-head-with-fur-project-file/?fbclid=IwAR3pzYt22K-pAWe5eIJFTqHlaW9nmSpxPNmcIYh3LJf-yFS7iJUizBcJOp4
And I check the render engine, it is still Cycle, but somehow the viewport still act as in Eevee.
