footer has been completely removed on version 12.3+ and will no longer render any contents from this layout and its component views.
In the sidenav-bar layout, the last
However, you will be able to move your buttons from footer to the Side Nav by following the Header section.
Keep in mind that the Side Nav design has different states (collapsed and expanded) as well as a submenu that can be explored to provide more options to your user.
Improve your user’s experience by avoid opening unnecessary popups or BWC Window to detect next steps, use your button’s submenu to provide a better experience and navigate to a different page from there.