I don't have any actual insights regarding the UK release of Sailor Moon, but given the data from the UK & France, a delay is kinda likely, especially if one assumes that they may share at least parts of the packaging.
- German release (Steelbook) was scheduled for Nov 21, 2025, currently "unavailable" with no new date announced
- "old" French release still pending Season 5 & movie set, they may want to finish that old release before starting a new one
- a lot of releases in Germany & France are facing delays of several months compared to older provisional schedules
- some releases announced by Crunchyroll Germany in August 2024 are still "date TBA"
Also a short reminder that Toei Europe is a bit "difficult" to deal with
Answerman - How Hard Was it to Get the UK Rights for Dragon Ball Z? and Sailor Moon is "difficult" as well (Remember the delays in Australia?)