Not a firm timeline, but work has been in progress on supporting OPC UA Events via Event Streams. This is targeting 8.3.x.
This is a separate effort from some kind of explicit support for Alarms and Conditions, which are a specific kind of Event in OPC UA, via some kind of integration into the Alarm system such that they would show up as Alarms in the system and be viewable in an Alarm Status Table. This probably won't happen in 8.3 at all.
You could still receive the Alarm Events and act on them in some way in the Event Stream (e.g. via a system.opcua.acknowledge function that will probably come at the same time), but you won't get the full integration.