Direkt in den Release Notes steht:
Speziell zu diesem Punkt (u.a.) gab es zudem am 29.08.2022 auch eine Vorankündigung mit den anstehenden Änderungen, die gleich zu Beginn der Release Notes nochmals verlinkt ist ('Please see our previous post for some highlights of this release').
Dort heisst es:
Group Management / Dedicated Black/Whitelist pages merged
When we first introduced group management years ago, we felt it necessary to keep these links separate to ease the transition (though they were actually the same page). With the next release the dedicated Black/Whitelist pages are removed, and instead the functionality can be found on the “Domains” heading of the side bar.