Here’s an article from when Biden set up his new site. No mass 404 issues, and when a URL did 404 they linked to the archive of the prior admin’s site. Biden transition ensured continuity from the prior admin, which is impressive since Trump White House was complete radio silence. https://wptavern.com/biden-white-house-sticks-with-wordpress-for-website-relaunch
Here’s an article from when Biden set up his new site. No mass 404 issues, and when a URL did 404 they linked to the archive of the prior admin’s site. Biden transition ensured continuity from the prior admin, which is impressive since Trump White House was complete radio silence. https://wptavern.com/biden-white-house-sticks-with-wordpress-for-website-relaunch