One more month is needed:
With that maintenance, we should be good to go for getting 2.4 out to users. 2.4 is currently planned for an April 14 release—Ladder will follow two weeks later on April 28.
Diablo II: Resurrected 2.4 & Ladder Update - March 24th - General Discussion - Diablo 2 Resurrected Forums (blizzard.com)