Adobe portfolio auto scroll

No.

Adobe Portfolio is a page to page website.  There is no scrolling involved.

There is an extensive FAQ & Knowledgebase as well as a dedicated Portfolio Support team to assist users with technical matters. Portfolio on Adobe UserVoice is for posting feedback and feature requests. See links below.
- FAQ & Knowledgebase - https://help.myportfolio.com/hc/en-us
- Contact Portfolio Support Team - https://help.myportfolio.com/hc/en-us/requests/new?ticket_form_id=177168
- Adobe UserVoice - https://helpx.adobe.com/x-productkb/global/how-to-user-voice.html

Let me move this to the Creative Cloud Services forum for you, where someone who knows the answer for your question is more likely to see it. Officially, Portfolio is not supported on this site. Try here instead:

http://help.myportfolio.com/

The Using the Community forum is for help in using the Adobe Support Community forums, not for help with specific programs. Product questions should be posted in the associated product community.