There can be several different reasons for high battery consumption and we got no info in which watch you are using, which watch face you have and how much and how you are using your watch.
One simple explanation can be that you are using the watch a lot. GPS, music, navigation etc uses extra battery. Even the Fenix 6X Pro will only last maximum15 hours when used to the max.
First of all make sure you got the latest software in your device. Most devices and updates can be done by the app, but it is always best to check with Garmin Express and see if there are any waiting for you.
Then restart your watch.
Switch to a watch face that doesn't display pulse, seconds, weather etc. Keep it as simple as possible. Easiest way is to use a standard watch face instead of downloading a new one and remove any data fields that updates often.
If that doesn't help you should do a factory reset and see if the battery life improves.
