Can Workspaces share preference center

@ishita_chawra  A couple more points to check:

Does your preference centre include global opt-in/out and Unsubscribe link included in all emails?
If you are dealing with EU data if your Pref Centre GDPR compliant?

In theory, yes. The items listed below are sharable across separate Workspaces. Provided your preference center doesn't require any items that aren't among this list, there is no reason other Workspaces could not access it. 

Email Templates
Landing page templates
Models
Smart campaigns
Smart Lists
Snippets
Segmentations

Yes, but why don’t you explain the business requirement you’re trying to meet here?