Question Curve Textmesh Pro in 3d

I have some text I want to put on a 3d curve. I've seen some old screenshots showing this is possible, but I cannot for the life of me get it to work with the example scripts provided.

I also tried making a 3d text gameobject (gameobject > 3d objects > TextmeshPro) and then applying SplineMesh to it, but that doesn't seem to work either.

I've played around with the warp/skew examples that come with TMP, but I can't seem to get it to warp in 3d, only rotate the individual text meshes on x and y.

Anyone had any experience with this? I figure it must be a common occurrence with diegetic ui's, but I'm coming up empty on any examples. Any ideas?