Over time, various shrines have been added to the respective difficulty levels, and FoA has added even more.
To my knowledge, the quest and Codex overview only displays 55 shrines (the heading actually reads 55/55), yet there are far more—especially on Ultimate difficulty.
This list should ideally include every possible shrine available for that difficulty level. It would be a great quality-of-life improvement, allowing you to see exactly what you’ve found (checked off) and what you’re missing.
This suggestion isn’t about the fact that you can only allocate 55 points (I’m aware of that); it’s about having a complete overview of what you have and what you don’t.