What is shown there is automatically selected depending on the available space and which values the stats have. You can’t influence it and it often makes no sense. There is an idea out there to change that where you can give your vote: 

If I click on the activity on my mobile I still see only 5 values. Is it not possible to see all details on a mobile?

In the browser view I can see max speed but it differs from the values in Garmin. I have 14.5 km/h in browser and 16.0 km/h in Garmin. How can that be? Distance is the same but Moving Time is different. Elapsed Time is same. 

Please join the discussion in the mentioned link where others have the same questions!

I don’t understand which link you mean. 

I provided only the one link and you have already posted there. For your new question about the moving time difference: This is unfortunately a common occurence if Strava imports activities from other platforms, you could check out the following thread where this was asked before: