As additional context, I recently spoke with a DoorDash delivery driver who showed me the map used in their app.
It clearly displayed a route directing them through my driveway at 49 Erland Rd to reach 43 Erland Rd.
The map source shown in the DoorDash driver app is Mapbox, which relies heavily on OpenStreetMap data.

This confirms that the incorrect routing isn’t just a tagging issue but one that directly affects navigation systems based on OSM.

Adding or keeping a note such as
note=No connection between 49 Erland Rd and 43 Erland Rd; private driveway; not for through access.
will help prevent downstream map providers from propagating this error.