Thank You Diana,
in wp-admin > Settings > BuddyPress > Activity Streams > Save Changes it'all OK
I'm take a screenshot
https://prnt.sc/ti9ger
"So as you can see the continue course button is showing progress only 5% which means the units are not attempted by user. So it will show 0 stats obviously"
Yes, but I don't see the student statistics, there are 309 students in total but the dashboard does not report any data.
My need is to see the student data.