Which buffs/debuffs are missing that you'd like to see added? I see petrification isn't in there, at the very least. 

i'm guessing op is referring to the new buffs and debuffs from blessings. the list is also missing the hydra specific icons, the ironbrand debuff and, as you mentioned, the petrification debuff. in addition, the increase resistance buff and decrease resistance debuff display the wrong image, the weaken debuff only shows the icon for the stronger version of the buff and not the weaker, and it would probably make sense to mention the meaning of the yellow border for protected buffs/debuffs somewhere on this list.

also, if/when petrification is added to the list, could you try and ensure it includes all of the effects? i spent months finding out everything it could do in-game—generally at the most inconvenient of times mid-match.

Perfect. Will pass this along, perhaps get something more streamlined on that page with regards to blessings and newer buffs/debuffs. 

There is also this thread on the forum which I think may be of assistance: https://plarium.com/forum/en/raid-shadow-legends/673_guides-and-tutorials/124102_list-buffs-and-debuffs/ which is updated. 

I believe similar for Blessings may be in the works, as well.