if you ask me, that is a bit out of scope for Camunda itself.
On a high level, you would probably have to provide a publicly accessible REST endpoint that can be called from UiPath - assuming you are using UiPath Cloud. That endpoint would then need some logic to analyze the data received from UiPath (e.g., verifying the payload and extracting the event and status) and trigger whatever you want to do in your Camunda instance, e.g., via Camunda’s REST API.
There probably are a lot of options to realize this depending on your tech stack and related architecture.