Can an option be added to have a landing page linked to social media so followers can sign up for my list?

You can set this up in your Privy account today! Here's a guide that walks through the steps: https://help.privy.com/hc/en-us/articles/360008057333-Create-a-landing-page. Once you launch your landing page, you'll be able to copy the URL from Privy and add this as a link in your social media accounts.