Thanks for this discussion. The previous announcement that you referred is for the last mile disconnected applications that you have configured through UiPath path. If you are already using UiPath, you can use the recently released RPA Connector and manage those end applications through SailPoint.
I appreciate the ask for having a UiPath governance connector. Here is a good news, there will be one in near future, which will support the robot accounts (machine account type).
However, for the aggregation and provisioning of normal user, based on our analysis, there is no such available ways and APIs which can be used to achieve this operation. So, even you can’t use the Web Services connector. I would suggest to raise an enhancement request with UiPath so that there will be API for getting other users who are present in UiPath and can be provisioned to UiPath.
We recently did this by provisioning to IDP groups (not PING) which then used these group memberships for provisioning to UIPath. You may want to look into this as an option. ref: Google Search