Can I leave apple watch on unplugged charging dock

Hi

Yes - you can leave your Apple Watch on the Magnetic Charging Dock regardless of whether or not it is plugged in.

You may find it most convenient to charge your watch nightly, overnight.

The watch cannot be overcharged and the battery will not suffer any harm from regular charging. Charging will stop automatically when the battery is fully charged and start again if and when required due to ongoing battery usage.

Follow Apple's safety and handling instructions and also note that:

• It is not possible to turn the watch off whilst it is on the charger and connected to power - this is normal.
• It is also normal for your watch, power adapter and charging cable to become warm when connected to power.

More information:

Check your battery and charge your Apple Watch - Apple Support

It stops charging when the battery so no damage occurs to the battery, you can leave it on the dock, It won't cause problems.