Gmail - Archive > 1 week && Mark As Read > 2 weeks

gistfile1.txt

function markArchivedAsRead() {
  
  var delayDays = 7; // will only impact emails more than 7 days old
  var maxDate = new Date();
  maxDate.setDate(maxDate.getDate()-delayDays); // what was the date at that time?
  
  //Look for unread emails that are older than 14 days and exclude starred emails
  var threads = GmailApp.search('label:unread older_than:14d -is:starred');
  GmailApp.markThreadsRead(threads);
  
  // we archive all the threads if they're unread AND older than the limit we set in delayDays
  for (var i = 0; i < threads.length; i++) {
    if (threads[i].getLastMessageDate()<maxDate)
    {
      threads[i].moveToArchive();
    }
  }
  
};

In google script, https://script.google.com, you can set a trigger to run this daily.