Looks like the Separate Ways DLC that came with the PS2 port may be coming down the line. I only played RE4 on the GameCube, so I never got to play this DLC. But looks like it focuses on Ada Wong, and considering how important she was in RE2, it makes sense that this DLC could make a return.
https://comicbook.com/gaming/news/resident-evil-4-re4-remake-dlc-tease/