Can you connect a power bi dashboard to display onto quick base?

Yes you can, China.  All you need to do is add a Web page with the Power BI dashboard URL to a Quick Base home page.  Users will need to sign into Power BI to view it.
https://help.quickbase.com/user-assistance/about_web_page_widgets_app_home_page.html?Highlight=web%20page

Let us know how it works out.