Lily active 2 connect iq

I would recommend to remove the watch from the Garmin Connect app/Bluetooth. Here is a helpful article on how to do this:

Remove and Add a Device From the Garmin Connect App 

You can also sync the watch using Garmin Express which should help with syncing, here is the download link and you can only use this in Garmin Express:

express.garmin.com

Also, double check the software is up to date. Express will also help update it if need be.