Tong I have provided answer to your questions below.
1) Please see the related post below regarding your question.
Velocity profile
2) There is no option to export X-Y curve data directly today. This is something that other users have suggested in the Ideas section. If you have other ideas please add them here. If you would like to add your vote to existing ideas you can do that as well. I have added a link to the X-Y curve export idea below.
Inflow velocity profile, etc
You are navigating away from the AIS Discovery experience