To this point, here’s Microsoft talking about the work they were doing to conflate data sources with OSM back in 2017:
I don’t have any inside knowledge to know if this particular project is being used in connection with Overture, but it’s a pretty obvious need for anyone working with datasets that don’t share a common stable identifier scheme – or that lack one altogether.
Conflation has long been important for routing use cases. For one thing, you need to be able to match traffic and incident data to the road network. OpenLR is a linear referencing system that TomTom helped standardize; it later found its way into OSM-based products (including by my employer Mapbox).