There is a new site footer layout for SharePoint communication sites. The new Extended layout features an enhanced experience for viewers and provides more navigational control for site authors. Footer layouts hold two levels of navigation and can be edited in the Change the look panel without losing formerly saved links and labels at any time.
The Extended layout for site footer will roll out to Targeted Release (entire organization) starting in May 2020 and will be completely rolled out to all customers by the end of July 2020.
You can find more information here