If you are not receiving detailed turn-by-turn routing when navigating to a waypoint, or following a route, this indicates that your device either does not have mapping that supports turn-by-turn routing, or its routing setting¹ needs to be changed.

What is Needed for Detailed Routing

A Map That Supports Turn-by-Turn Routing

Not all maps support detailed turn-by-turn routing. Mapping products like the Worldwide DEM basemap or Topo US 100K do not support turn-by-turn routing, TopoActive² supports turn-by-turn routing but not when in an Automotive profile, while Topo US 24K West supports turn-by-turn routing in all land-based profiles and activities.
If you have a map, you can confirm it is capable of detailed routing by looking it up on Garmin.com. It should state that it has routable roads and/or trails, or it supports turn-by-turn directions.
If you do not have a map and want one, see - Choosing and Purchasing a Map for your Outdoor Handheld or Watch

A Profile or Activity That Supports Turn-by-Turn Routing

Activities and profiles on outdoor handhelds are designed to quickly change settings so recording your outings is easier. Some profiles and activities support detailed routing (Automobile, and Hike for example), while others support direct routing (Off Road or Direct Routing).
For more information on setting up your device for detailed routing, refer to the routing settings section of your owner's manual.

¹Direct routing draws a straight line to your destination, or straight lines between points of a route that you are following. For more information, see Related.

²TopoActive is not compatible with all products.