Shove did, at one point, use the human animations and poses, and it looked quite bad as a result of the anchoring points - a recurring issue. It has, however, been fixed at some point and now halflings, male and female, have their own unique shove pose and animation! Yay! The follow through animations are also unique and fitted, and it's actually looking pretty good now!
I'll take a moment to thank the helpful models who agreed to prance about in their underwear for the sake of my testing, thanks to Dia, warlock of the White Darkness, thanks to Vivian, warlock of the Frozen Scintillation, and thanks to Shadowheart in a variety of differnt disguise-self forms wherever my other two lacked the spell or ability to pull up the required pose.
Anyway, this one is here because since that fix, male and female halflings preparing to shove someone become entirely static - the preparing pose is exactly that - a pose, which does not animate at all, making your character appear completely rigid. As an aside to this comment, the human standard uses the same holding pose for Shove as it does for Dash and Throw - I'm not sure if Larian intend to replace one or several of these at some point or not, but I'll flag that all three are the same, when, after being fixed, they are not all the same for small race characters.
That's all I'll do for today - I have to keep working on these save files to capture other poses and animations in cutscenes still ^.^