No direct sequel to Resident Evil Code: Veronica X exists. It's a standalone mainline entry (originally Dreamcast 2000, PS2 "X" 2001) that bridges the classic era and the action shift of RE4.
Resident Evil 4 (2005) – Leon S. Kennedy's mission in rural Spain. Radical gameplay shift (over-shoulder, action focus). No direct narrative continuation—new setting, new threat (Los Illuminados).
No "Code: Veronica 2"—but its DNA runs through the whole series.