It are always things missing in a game jam. :D
I think for haptics/rumble no addon is necessary, but I saw that the godot-xr-tools has some additional "XRToolsRumbler" Node whiczh probably would be even better.
This is how I did it:
That makes sense, and I have it stubbed in, but I wasn't happy with the behavior of it. There were some lingering feedback scenarios that got really distracting.
I tried putting it on the items that caused rumble, as well as on the paws themselves and neither really worked the way I wanted. I'll keep picking away at it, and hopefully get it done by the time voting is over. Once voting is done, I'll re-release the game with a bunch of quality of life updates from all the great feedback!