From my last count (around 2 months ago), the confession count is as follows:
1. Jacob Frye: 1,434 confessions
2. Connor Kenway: 830 confessions
3. Ezio Auditore: 441 confessions
4. Shay Cormac: 406 confessions
5. Evie Frye: 405 confessions
6. Arno Dorian: 396 confessions
7. Altair Ibn La’Ahad: 320 confessions
8. Edward Kenway: 303 confessions
9. Haytham Kenway: 214 confessions
10. Crawford Starrick: 165 confessions
Since I’m counting these manually (!!!) I’ve only counted the confessions in the recent top 10. ;^^ If you wish to know the confession count of a specific character not mentioned, just reply to this post and I’ll respond to you. 😀
And FYI, there are already Bayek confessions. I just haven’t updated the tags page yet to include AC Origins ;^^
~ Signora Paola