Scrollable anchor links aren't supported everywhere. Currently, support for local anchor links in email clients is still quite mixed (with some email clients that won't do anything when a scrollable link is clicked), so please be aware of this and try to design your emails with the "progressive enhancement" of these scrollable links in mind.
To create a scrollable anchor link for any Button or Navbar Link layer in your email design, you can create a "Scroll To" Figma Prototype link that points to a Row layer in the same Emailify frame, and the plugin will automatically add an id and name attribute to the target Row element, and add a href to your Button or Navbar Link <a> tag that points to it (eg. #a123).