I don't use Garmin Explore all the time but when I do I have a lot of issues. The whole thing is a little confusing.
However, now I have activities synced from my Fenix 8 watch to a collection but a period from mid May until beginning of July is missing.
We had a trip to Norway with some hikes and walks and those are not synced. They are otherwise available in Garmin Connect of course.
Any idea why?