I need some unity help!!!

I had this idea to add an OSC driven thing to my avatar of the new deer sona, they've got a leaf on their head with a gradient and i thought it would be really neat to utilize that to show my tracker battery! Above is a gif of the animation i made.

I've tried a couple different float parameters that are listed in this XSOverlay changelog from two years ago. but the value just isnt driving in VRChat itself.

I know i set up OSC right, i can see all of the XSOverlay parameters in VRChat's OSC debug menu and they all update in real time (although its hard to tell in the particular picture above), but as evident by the second half of the image, the float isn't actually being driven because it's still set to 0.
I can tell the game uses the animation at least sorta since the leaf in world isnt in the "default" state (see gif at top before i hit preview), but it just doesnt move. It only just hit me right now as im typing that the float for battery goes in reverse (from 1 -> 0), so maybe since the default state is 0 it cant play like, negative animation frames but i dont know how to set that up regardless. :P
If anyone has any insight, lmk! Im new to all this OSC blendshape/tree stuff so anything is appreciated!!!