https://www.videogameschronicle.com/...ke-overhauled/
tl-dr: Capcom was outsourcing work to M2 who worked on the RE3 remake. But there was a disagreement over M2 wanting to remain more faithful to the original RE4 after the reaction to their work on RE3 that cut sections was far more mixed than RE2s more faithful adaptation. But apparently Capcom wants more extreme changes and have brought it back under the wing of Division 1 who made REmake 2 and RE7.
So more RE4 people working on it now, but capcom apparently wants to change it a lot more.
My guess is it comes out 23 at the earliest and ends at the castle with the hive boss.