No issues with Garmin but could your add lawn mowing and shoveling snow? I just mowed two acres and only have 2600 steps recorded.
even with a lawn mowing app you will not get steps if your arm is not moving. You can always copy an outdoor walking app and rename it mowing if you really wanted to. If you are more interested in step count you can move your watch to your pocket or just push the mower with one hand like i used to do.
Now I just dont care that much.