Hello @greenbeanluvr
Thanks for posting about this. There's a couple of things I would recommend you check:
1) When you record with your new Garmin watch in workout mode, is it recording GPS data? If it is, then Strava will calculate a moving time based on that. For an activity like rock climbing where you are moving upwards at a slow pace, that calculation will not be accurate.
2) if that's the case, check to see what moving time is shown on those two rock climbing activities you mention. I suspect if you add those 2 values together, you'll find it equates to the 56 minutes of time you're seeing on your weekly graph. If a moving time is available for an activity, that will be shown on the weekly graph instead of elapsed time.
For future recordings, I would recommend turning off GPS recording on your Garmin device, you could also contact Garmin and find out if there's a particular activity type they recommend you use to record rock climbing with on their devices:
https://support.garmin.com/
Let me know if that's helpful!