Garmin ran out of battery mid-hike

Hello,

My Garmin Forerunner 265 ran out of battery mid-hike today and the partial activity has saved on my watch but after syncing I cannot access it via Garmin Connect (I've done this through the laptop and the app).

Also, the training load is available through the activity but isn't reflected in the training load section and I fear I may drop into the dreaded de-training category. Any advice on how to many everything right in the world?