If the addon displays a '0' then that's what it thinks the kill number is, which, naturally, may or may not be wrong. The kill numbers recorded are exactly what you're reading, there's no secret data store that you can't access and Rarity doesn't hide the counter from you, as far as I know.

I mean, is your question answered? If there's something actionable here I'll do my best to help, but I unfortunately can't change the statistics count on Blizzard's servers. Unless you changed it or deleted/cleared them at some point after getting the mount, Rarity would probably have made a screenshot when you actually obtained it, and that's where the attempt count is also written. There should be no need to dig around in SavedVariables/Lua files, but in case you wanted to I still added the instructions.ДЄnother option I can think of is to simply check your Screenshots folder. The other options I gave were more advanced, in case this count isn't what you were referring to. But you've already got the mount and clearly didn't remember the number it printed, so now you wanted to check the last one the addon saved? That's what I understand you wanted to do, anyway. That's what most people use it for, after all. Naturally, the addon prints the attempt count after you kill the boss. That's what I meant when I said 'Options UI', and it's the simplest way to get the attempts count (far simpler than printing something in chat). Press ESC, go to Interface > Addons > Rarity and then Mounts > Reins of the Astral Cloud Serpents. The easiest way to get the number after the fact is exactly as I wrote:

Wow addon to track mounts