SharePoint Online landing page with lists data from across different classic SharePoint Online sites

Hi All,

I have a SharePoint Online requirement where some SPO sites has classic information architecture.  

and other users have created modern pages within the same site other sites collections.

The requirements are:

• The landing page needs to be interactive with following web parts.
  • News and Announcements
  • Calendar
  • Quick Links
  • Frequently used forms.
  • Discussion board
    
    
• As users are using both classic and modern pages, do we option that using modern SharePoint Online page (using Modern Teams Site Template) and pull lists from classic web parts across SharePoint online sites?
  
  Suggestions like Page Viewer Web Part  https://sharepoint.stackexchange.com/questions/241554/display-a-list-library-from-one-site-to-another-site-with-sharepoint-online-o36  OR  we have any SPFx solution for this kind of requirement?
  
  Any pointers will be highly appreciated.